diff --git a/include/nil/crypto3/multiprecision/complex128.hpp b/include/nil/crypto3/multiprecision/complex128.hpp
index 10522bab..16cbd3d8 100644
--- a/include/nil/crypto3/multiprecision/complex128.hpp
+++ b/include/nil/crypto3/multiprecision/complex128.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_COMPLEX128_HPP
-#define BOOST_MP_COMPLEX128_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/float128.hpp>
 #include <nil/crypto3/multiprecision/complex_adaptor.hpp>
@@ -23,5 +22,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/complex_adaptor.hpp b/include/nil/crypto3/multiprecision/complex_adaptor.hpp
index ce5b2a93..5ff474f4 100644
--- a/include/nil/crypto3/multiprecision/complex_adaptor.hpp
+++ b/include/nil/crypto3/multiprecision/complex_adaptor.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MULTIPRECISION_COMPLEX_ADAPTOR_HPP
-#define BOOST_MULTIPRECISION_COMPLEX_ADAPTOR_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/number.hpp>
 #include <cstdint>
@@ -834,5 +833,3 @@ namespace nil {
 
     }    // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/concepts/mp_number_archetypes.hpp b/include/nil/crypto3/multiprecision/concepts/mp_number_archetypes.hpp
index 2af218d8..4ff7d3b5 100644
--- a/include/nil/crypto3/multiprecision/concepts/mp_number_archetypes.hpp
+++ b/include/nil/crypto3/multiprecision/concepts/mp_number_archetypes.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MATH_CONCEPTS_ER_HPP
-#define BOOST_MATH_CONCEPTS_ER_HPP
+#pragma once
 
 #include <iostream>
 #include <sstream>
@@ -242,5 +241,3 @@ namespace std {
 #ifdef BOOST_MSVC
 #pragma warning(pop)
 #endif
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_bin_float.hpp b/include/nil/crypto3/multiprecision/cpp_bin_float.hpp
index f6e68a75..3f5cc5a2 100644
--- a/include/nil/crypto3/multiprecision/cpp_bin_float.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_bin_float.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MATH_CPP_BIN_FLOAT_HPP
-#define BOOST_MATH_CPP_BIN_FLOAT_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/cpp_int.hpp>
 #include <nil/crypto3/multiprecision/integer.hpp>
@@ -2401,5 +2400,3 @@ namespace std {
         ExpressionTemplates>>::round_style;
 
 }    // namespace std
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_bin_float/io.hpp b/include/nil/crypto3/multiprecision/cpp_bin_float/io.hpp
index 3c5b8a2a..a589618f 100644
--- a/include/nil/crypto3/multiprecision/cpp_bin_float/io.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_bin_float/io.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_CPP_BIN_FLOAT_IO_HPP
-#define BOOST_MP_CPP_BIN_FLOAT_IO_HPP
+#pragma once
 
 namespace nil {
     namespace crypto3 {
@@ -693,5 +692,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_complex.hpp b/include/nil/crypto3/multiprecision/cpp_complex.hpp
index eda5f488..364ce5d5 100644
--- a/include/nil/crypto3/multiprecision/cpp_complex.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_complex.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_CPP_COMPLEX_HPP
-#define BOOST_MP_CPP_COMPLEX_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/cpp_bin_float.hpp>
 #include <nil/crypto3/multiprecision/complex_adaptor.hpp>
@@ -37,5 +36,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_dec_float.hpp b/include/nil/crypto3/multiprecision/cpp_dec_float.hpp
index 46168c26..4924249f 100644
--- a/include/nil/crypto3/multiprecision/cpp_dec_float.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_dec_float.hpp
@@ -13,8 +13,7 @@
 // can detect noexcept misuse at compile time, the only realistic option is to simply not use it here.
 //
 
-#ifndef BOOST_MP_CPP_DEC_FLOAT_BACKEND_HPP
-#define BOOST_MP_CPP_DEC_FLOAT_BACKEND_HPP
+#pragma once
 
 #include <boost/config.hpp>
 #include <cstdint>
@@ -3555,5 +3554,3 @@ namespace boost {
 #ifdef BOOST_MSVC
 #pragma warning(pop)
 #endif
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int.hpp b/include/nil/crypto3/multiprecision/cpp_int.hpp
index 2015c8f9..c0944cc1 100644
--- a/include/nil/crypto3/multiprecision/cpp_int.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_CPP_INT_HPP
-#define BOOST_MP_CPP_INT_HPP
+#pragma once
 
 #ifndef TVM
 #include <iostream>
@@ -2767,9 +2766,6 @@ namespace nil {
 #include <nil/crypto3/multiprecision/cpp_int/bitwise.hpp>
 #include <nil/crypto3/multiprecision/cpp_int/misc.hpp>
 #include <nil/crypto3/multiprecision/cpp_int/literals.hpp>
-#include <nil/crypto3/multiprecision/cpp_int/serialize.hpp>
 #include <nil/crypto3/multiprecision/cpp_int/import_export.hpp>
 #include <nil/crypto3/multiprecision/cpp_int/eval_jacobi.hpp>
 //#include <nil/crypto3/multiprecision/cpp_int/eval_ressol.hpp>
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/add.hpp b/include/nil/crypto3/multiprecision/cpp_int/add.hpp
index 32b222d7..9be1c2db 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/add.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/add.hpp
@@ -5,8 +5,7 @@
 //
 // Comparison operators for cpp_int_backend:
 //
-#ifndef BOOST_MP_CPP_INT_ADD_HPP
-#define BOOST_MP_CPP_INT_ADD_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/detail/constexpr.hpp>
 #include <nil/crypto3/multiprecision/cpp_int/add_unsigned.hpp>
@@ -605,5 +604,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/add_unsigned.hpp b/include/nil/crypto3/multiprecision/cpp_int/add_unsigned.hpp
index 7cd69af6..d7ad0dd0 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/add_unsigned.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/add_unsigned.hpp
@@ -4,8 +4,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_ADD_UNSIGNED_ADDC_32_HPP
-#define BOOST_MP_ADD_UNSIGNED_ADDC_32_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/cpp_int/intel_intrinsics.hpp>
 
@@ -382,5 +381,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/bitwise.hpp b/include/nil/crypto3/multiprecision/cpp_int/bitwise.hpp
index 7213e7fb..8661a59b 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/bitwise.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/bitwise.hpp
@@ -5,8 +5,7 @@
 //
 // Comparison operators for cpp_int_backend:
 //
-#ifndef BOOST_MP_CPP_INT_BIT_HPP
-#define BOOST_MP_CPP_INT_BIT_HPP
+#pragma once
 
 #ifdef _MSC_VER
 #pragma warning(push)
@@ -962,5 +961,3 @@ namespace nil {
 #ifdef _MSC_VER
 #pragma warning(pop)
 #endif
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/checked.hpp b/include/nil/crypto3/multiprecision/cpp_int/checked.hpp
index 10d09b0c..6f762654 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/checked.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/checked.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_CPP_INT_CHECKED_HPP
-#define BOOST_MP_CPP_INT_CHECKED_HPP
+#pragma once
 
 namespace nil {
     namespace crypto3 {
@@ -151,5 +150,3 @@ namespace nil {
         }            // namespace multiprecision
     }                // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/comparison.hpp b/include/nil/crypto3/multiprecision/cpp_int/comparison.hpp
index ad7b4a8b..ab96b0bb 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/comparison.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/comparison.hpp
@@ -5,8 +5,7 @@
 //
 // Comparison operators for cpp_int_backend:
 //
-#ifndef BOOST_MP_CPP_INT_COMPARISON_HPP
-#define BOOST_MP_CPP_INT_COMPARISON_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/detail/constexpr.hpp>
 
@@ -396,5 +395,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/cpp_int_config.hpp b/include/nil/crypto3/multiprecision/cpp_int/cpp_int_config.hpp
index 38c355f7..16ff83ff 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/cpp_int_config.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/cpp_int_config.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_CPP_INT_CORE_HPP
-#define BOOST_MP_CPP_INT_CORE_HPP
+#pragma once
 
 #include <boost/integer.hpp>
 #include <boost/integer_traits.hpp>
@@ -222,5 +221,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_CPP_INT_CORE_HPP
diff --git a/include/nil/crypto3/multiprecision/cpp_int/divide.hpp b/include/nil/crypto3/multiprecision/cpp_int/divide.hpp
index 977aca1f..e582ffee 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/divide.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/divide.hpp
@@ -5,8 +5,7 @@
 //
 // Comparison operators for cpp_int_backend:
 //
-#ifndef BOOST_MP_CPP_INT_DIV_HPP
-#define BOOST_MP_CPP_INT_DIV_HPP
+#pragma once
 
 namespace nil {
     namespace crypto3 {
@@ -720,5 +719,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/eval_jacobi.hpp b/include/nil/crypto3/multiprecision/cpp_int/eval_jacobi.hpp
index 6e09ee09..8a054752 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/eval_jacobi.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/eval_jacobi.hpp
@@ -7,8 +7,7 @@
 // http://www.boost.org/LICENSE_1_0.txt
 //---------------------------------------------------------------------------//
 
-#ifndef BOOST_MULTIPRECISION_EVAL_JACOBI_HPP
-#define BOOST_MULTIPRECISION_EVAL_JACOBI_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/detail/default_ops.hpp>
 
@@ -82,5 +81,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MULTIPRECISION_EVAL_JACOBI_HPP
diff --git a/include/nil/crypto3/multiprecision/cpp_int/import_export.hpp b/include/nil/crypto3/multiprecision/cpp_int/import_export.hpp
index de6978e6..2d7b4170 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/import_export.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/import_export.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_CPP_INT_IMPORT_EXPORT_HPP
-#define BOOST_MP_CPP_INT_IMPORT_EXPORT_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/traits/conditional_make_unsigned.hpp>
 
@@ -276,5 +275,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_CPP_INT_IMPORT_EXPORT_HPP
diff --git a/include/nil/crypto3/multiprecision/cpp_int/intel_intrinsics.hpp b/include/nil/crypto3/multiprecision/cpp_int/intel_intrinsics.hpp
index 36bdf08d..d337e523 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/intel_intrinsics.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/intel_intrinsics.hpp
@@ -5,8 +5,8 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_INTEL_INTRINSICS_HPP
-#define BOOST_MP_INTEL_INTRINSICS_HPP
+#pragma once
+
 //
 // Select which actual implementation header to use:
 //
@@ -126,5 +126,3 @@ namespace nil {
 #endif
 
 #endif
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/limits.hpp b/include/nil/crypto3/multiprecision/cpp_int/limits.hpp
index ff5b34bb..c78ff70b 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/limits.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/limits.hpp
@@ -5,8 +5,7 @@
 //
 // Comparison operators for cpp_int_backend:
 //
-#ifndef BOOST_MP_CPP_INT_LIM_HPP
-#define BOOST_MP_CPP_INT_LIM_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/traits/max_digits10.hpp>
 
@@ -482,5 +481,3 @@ namespace std {
 #endif
 
 }    // namespace std
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/literals.hpp b/include/nil/crypto3/multiprecision/cpp_int/literals.hpp
index eefb2a0a..06b92697 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/literals.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/literals.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_CPP_INT_LITERALS_HPP
-#define BOOST_MP_CPP_INT_LITERALS_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/cpp_int/cpp_int_config.hpp>
 
@@ -292,5 +291,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_CPP_INT_CORE_HPP
diff --git a/include/nil/crypto3/multiprecision/cpp_int/misc.hpp b/include/nil/crypto3/multiprecision/cpp_int/misc.hpp
index a3e2a6ec..33137818 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/misc.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/misc.hpp
@@ -7,8 +7,7 @@
 //
 // Comparison operators for cpp_int_backend:
 //
-#ifndef BOOST_MP_CPP_INT_MISC_HPP
-#define BOOST_MP_CPP_INT_MISC_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/detail/constexpr.hpp>
 #include <nil/crypto3/multiprecision/detail/bitscan.hpp>    // lsb etc
@@ -1542,5 +1541,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/multiply.hpp b/include/nil/crypto3/multiprecision/cpp_int/multiply.hpp
index fdb8f00a..47c36c2b 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/multiply.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/multiply.hpp
@@ -7,8 +7,7 @@
 //
 // Comparison operators for cpp_int_backend:
 //
-#ifndef BOOST_MP_CPP_INT_MUL_HPP
-#define BOOST_MP_CPP_INT_MUL_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/integer.hpp>
 
@@ -1009,5 +1008,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/cpp_int/serialize.hpp b/include/nil/crypto3/multiprecision/cpp_int/serialize.hpp
deleted file mode 100644
index 1e343b86..00000000
--- a/include/nil/crypto3/multiprecision/cpp_int/serialize.hpp
+++ /dev/null
@@ -1,203 +0,0 @@
-///////////////////////////////////////////////////////////////
-//  Copyright 2013 John Maddock. Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
-
-#ifndef BOOST_MP_CPP_INT_SERIALIZE_HPP
-#define BOOST_MP_CPP_INT_SERIALIZE_HPP
-
-namespace boost {
-
-    namespace archive {
-
-        class binary_oarchive;
-        class binary_iarchive;
-
-    }    // namespace archive
-
-    namespace serialization {
-
-        namespace mp = nil::crypto3::multiprecision;
-
-        namespace cpp_int_detail {
-
-            using namespace nil::crypto3::multiprecision;
-            using namespace nil::crypto3::multiprecision::backends;
-
-            template<class T>
-            struct is_binary_archive : public std::integral_constant<bool, false> { };
-            template<>
-            struct is_binary_archive<boost::archive::binary_oarchive> : public std::integral_constant<bool, true> { };
-            template<>
-            struct is_binary_archive<boost::archive::binary_iarchive> : public std::integral_constant<bool, true> { };
-
-            //
-            // We have 8 serialization methods to fill out (and test), they are all permutations of:
-            // Load vs Store.
-            // Trivial or non-trivial cpp_int type.
-            // Binary or not archive.
-            //
-            template<class Archive, class Int>
-            void do_serialize(Archive& ar, Int& val, std::integral_constant<bool, false> const&,
-                              std::integral_constant<bool, false> const&, std::integral_constant<bool, false> const&) {
-                // Load.
-                // Non-trivial.
-                // Non binary.
-
-                using boost::make_nvp;
-                bool s;
-                ar& make_nvp("sign", s);
-                std::size_t limb_count;
-                std::size_t byte_count;
-                ar& make_nvp("byte-count", byte_count);
-                limb_count = byte_count / sizeof(limb_type) + ((byte_count % sizeof(limb_type)) ? 1 : 0);
-                val.resize(limb_count, limb_count);
-                limb_type* pl = val.limbs();
-                for (std::size_t i = 0; i < limb_count; ++i) {
-                    pl[i] = 0;
-                    for (std::size_t j = 0; (j < sizeof(limb_type)) && byte_count; ++j) {
-                        unsigned char byte;
-                        ar& make_nvp("byte", byte);
-                        pl[i] |= static_cast<limb_type>(byte) << (j * CHAR_BIT);
-                        --byte_count;
-                    }
-                }
-                if (s != val.sign())
-                    val.negate();
-                val.normalize();
-            }
-            template<class Archive, class Int>
-            void do_serialize(Archive& ar, Int& val, std::integral_constant<bool, true> const&,
-                              std::integral_constant<bool, false> const&, std::integral_constant<bool, false> const&) {
-                // Store.
-                // Non-trivial.
-                // Non binary.
-
-                using boost::make_nvp;
-                bool s = val.sign();
-                ar& make_nvp("sign", s);
-                limb_type* pl = val.limbs();
-                std::size_t limb_count = val.size();
-                std::size_t byte_count = limb_count * sizeof(limb_type);
-                ar& make_nvp("byte-count", byte_count);
-
-                for (std::size_t i = 0; i < limb_count; ++i) {
-                    limb_type l = pl[i];
-                    for (std::size_t j = 0; j < sizeof(limb_type); ++j) {
-                        unsigned char byte = static_cast<unsigned char>((l >> (j * CHAR_BIT)) & ((1u << CHAR_BIT) - 1));
-                        ar& make_nvp("byte", byte);
-                    }
-                }
-            }
-            template<class Archive, class Int>
-            void do_serialize(Archive& ar, Int& val, std::integral_constant<bool, false> const&,
-                              std::integral_constant<bool, true> const&, std::integral_constant<bool, false> const&) {
-                // Load.
-                // Trivial.
-                // Non binary.
-                using boost::make_nvp;
-                bool s;
-                typename Int::local_limb_type l = 0;
-                ar& make_nvp("sign", s);
-                std::size_t byte_count;
-                ar& make_nvp("byte-count", byte_count);
-                for (std::size_t i = 0; i < byte_count; ++i) {
-                    unsigned char b;
-                    ar& make_nvp("byte", b);
-                    l |= static_cast<typename Int::local_limb_type>(b) << (i * CHAR_BIT);
-                }
-                *val.limbs() = l;
-                if (s != val.sign())
-                    val.negate();
-            }
-            template<class Archive, class Int>
-            void do_serialize(Archive& ar, Int& val, std::integral_constant<bool, true> const&,
-                              std::integral_constant<bool, true> const&, std::integral_constant<bool, false> const&) {
-                // Store.
-                // Trivial.
-                // Non binary.
-                using boost::make_nvp;
-                bool s = val.sign();
-                typename Int::local_limb_type l = *val.limbs();
-                ar& make_nvp("sign", s);
-                std::size_t limb_count = sizeof(l);
-                ar& make_nvp("byte-count", limb_count);
-                for (std::size_t i = 0; i < limb_count; ++i) {
-                    unsigned char b =
-                        static_cast<unsigned char>(static_cast<typename Int::local_limb_type>(l >> (i * CHAR_BIT)) &
-                                                   static_cast<typename Int::local_limb_type>((1u << CHAR_BIT) - 1));
-                    ar& make_nvp("byte", b);
-                }
-            }
-            template<class Archive, class Int>
-            void do_serialize(Archive& ar, Int& val, std::integral_constant<bool, false> const&,
-                              std::integral_constant<bool, false> const&, std::integral_constant<bool, true> const&) {
-                // Load.
-                // Non-trivial.
-                // Binary.
-                bool s;
-                std::size_t c;
-                ar& s;
-                ar& c;
-                val.resize(c, c);
-                ar.load_binary(val.limbs(), c * sizeof(limb_type));
-                if (s != val.sign())
-                    val.negate();
-                val.normalize();
-            }
-            template<class Archive, class Int>
-            void do_serialize(Archive& ar, Int& val, std::integral_constant<bool, true> const&,
-                              std::integral_constant<bool, false> const&, std::integral_constant<bool, true> const&) {
-                // Store.
-                // Non-trivial.
-                // Binary.
-                bool s = val.sign();
-                std::size_t c = val.size();
-                ar& s;
-                ar& c;
-                ar.save_binary(val.limbs(), c * sizeof(limb_type));
-            }
-            template<class Archive, class Int>
-            void do_serialize(Archive& ar, Int& val, std::integral_constant<bool, false> const&,
-                              std::integral_constant<bool, true> const&, std::integral_constant<bool, true> const&) {
-                // Load.
-                // Trivial.
-                // Binary.
-                bool s;
-                ar& s;
-                ar.load_binary(val.limbs(), sizeof(*val.limbs()));
-                if (s != val.sign())
-                    val.negate();
-            }
-            template<class Archive, class Int>
-            void do_serialize(Archive& ar, Int& val, std::integral_constant<bool, true> const&,
-                              std::integral_constant<bool, true> const&, std::integral_constant<bool, true> const&) {
-                // Store.
-                // Trivial.
-                // Binary.
-                bool s = val.sign();
-                ar& s;
-                ar.save_binary(val.limbs(), sizeof(*val.limbs()));
-            }
-
-        }    // namespace cpp_int_detail
-
-        template<class Archive, unsigned MinBits, unsigned MaxBits, mp::cpp_integer_type SignType,
-                 mp::cpp_int_check_type Checked, class Allocator>
-        void serialize(Archive& ar, mp::cpp_int_backend<MinBits, MaxBits, SignType, Checked, Allocator>& val,
-                       const unsigned int /*version*/) {
-            using archive_save_tag = typename Archive::is_saving;
-            using save_tag = std::integral_constant<bool, archive_save_tag::value>;
-            using trivial_tag =
-                std::integral_constant<bool, mp::backends::is_trivial_cpp_int<mp::cpp_int_backend<
-                                                 MinBits, MaxBits, SignType, Checked, Allocator>>::value>;
-            using binary_tag = typename cpp_int_detail::is_binary_archive<Archive>::type;
-
-            // Just dispatch to the correct method:
-            cpp_int_detail::do_serialize(ar, val, save_tag(), trivial_tag(), binary_tag());
-        }
-
-    }    // namespace serialization
-}    // namespace boost
-
-#endif    // BOOST_MP_CPP_INT_SERIALIZE_HPP
diff --git a/include/nil/crypto3/multiprecision/cpp_int/value_pack.hpp b/include/nil/crypto3/multiprecision/cpp_int/value_pack.hpp
index a0612d5b..83bdafca 100644
--- a/include/nil/crypto3/multiprecision/cpp_int/value_pack.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_int/value_pack.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_CPP_INT_VP_HPP
-#define BOOST_MP_CPP_INT_VP_HPP
+#pragma once
 
 namespace nil {
     namespace crypto3 {
@@ -45,5 +44,3 @@ namespace nil {
         }            // namespace multiprecision
     }                // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_CPP_INT_CORE_HPP
diff --git a/include/nil/crypto3/multiprecision/cpp_modular.hpp b/include/nil/crypto3/multiprecision/cpp_modular.hpp
index bcd97a2b..350049d8 100644
--- a/include/nil/crypto3/multiprecision/cpp_modular.hpp
+++ b/include/nil/crypto3/multiprecision/cpp_modular.hpp
@@ -7,8 +7,7 @@
 // http://www.boost.org/LICENSE_1_0.txt
 //---------------------------------------------------------------------------//
 
-#ifndef BOOST_MP_CPP_MODULAR_HPP
-#define BOOST_MP_CPP_MODULAR_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/modular/modular_params.hpp>
 #include <nil/crypto3/multiprecision/modular/modular_adaptor.hpp>
@@ -96,5 +95,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/debug_adaptor.hpp b/include/nil/crypto3/multiprecision/debug_adaptor.hpp
index 90534715..05cc2935 100644
--- a/include/nil/crypto3/multiprecision/debug_adaptor.hpp
+++ b/include/nil/crypto3/multiprecision/debug_adaptor.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MATH_DEBUG_ADAPTER_HPP
-#define BOOST_MATH_DEBUG_ADAPTER_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/traits/extract_exponent_type.hpp>
 #include <nil/crypto3/multiprecision/detail/integer_ops.hpp>
@@ -509,5 +508,3 @@ namespace boost {
 
     }    // namespace math
 }    // namespace boost
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/detail/atomic.hpp b/include/nil/crypto3/multiprecision/detail/atomic.hpp
index 861433ad..9c324a6c 100644
--- a/include/nil/crypto3/multiprecision/detail/atomic.hpp
+++ b/include/nil/crypto3/multiprecision/detail/atomic.hpp
@@ -4,8 +4,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MT_ATOMIC_DETAIL_HPP
-#define BOOST_MT_ATOMIC_DETAIL_HPP
+#pragma once
 
 #include <boost/config.hpp>
 
@@ -67,5 +66,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MATH_ATOMIC_DETAIL_HPP
diff --git a/include/nil/crypto3/multiprecision/detail/bitscan.hpp b/include/nil/crypto3/multiprecision/detail/bitscan.hpp
index 8ff667af..5e68cf09 100644
--- a/include/nil/crypto3/multiprecision/detail/bitscan.hpp
+++ b/include/nil/crypto3/multiprecision/detail/bitscan.hpp
@@ -5,8 +5,7 @@
 //
 // Comparison operators for cpp_int_backend:
 //
-#ifndef BOOST_MP_DETAIL_BITSCAN_HPP
-#define BOOST_MP_DETAIL_BITSCAN_HPP
+#pragma once
 
 #ifndef TVM
 #include <boost/predef/other/endian.h>
@@ -270,5 +269,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/detail/constexpr.hpp b/include/nil/crypto3/multiprecision/detail/constexpr.hpp
index 64b1e5e0..a2ca81aa 100644
--- a/include/nil/crypto3/multiprecision/detail/constexpr.hpp
+++ b/include/nil/crypto3/multiprecision/detail/constexpr.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_CONSTEXPR_HPP
-#define BOOST_MP_CONSTEXPR_HPP
+#pragma once
 
 #include <boost/config.hpp>
 
@@ -76,5 +75,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/detail/default_ops.hpp b/include/nil/crypto3/multiprecision/detail/default_ops.hpp
index 2ccf7310..41479d79 100644
--- a/include/nil/crypto3/multiprecision/detail/default_ops.hpp
+++ b/include/nil/crypto3/multiprecision/detail/default_ops.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MATH_BIG_NUM_DEF_OPS
-#define BOOST_MATH_BIG_NUM_DEF_OPS
+#pragma once
 
 #include <boost/core/no_exceptions_support.hpp>    // BOOST_TRY
 #ifndef TVM
@@ -846,7 +845,7 @@ namespace nil {
                     return val.compare(static_cast<ui_type>(0)) == 0;
                 }
                 template<class T>
-                inline BOOST_MP_CXX14_CONSTEXPR int eval_get_sign(const T& val) {
+                inline BOOST_MP_CXX14_CONSTEXPR int eval_get_sign(const T &val) {
                     using ui_type = typename std::tuple_element<0, typename T::unsigned_types>::type;
                     return val.compare(static_cast<ui_type>(0));
                 }
@@ -3842,5 +3841,3 @@ namespace boost {
 // min/max overloads:
 //
 #include <nil/crypto3/multiprecision/detail/min_max.hpp>
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/detail/digits.hpp b/include/nil/crypto3/multiprecision/detail/digits.hpp
index e8acaa99..17dca412 100644
--- a/include/nil/crypto3/multiprecision/detail/digits.hpp
+++ b/include/nil/crypto3/multiprecision/detail/digits.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_DIGITS_HPP
-#define BOOST_MP_DIGITS_HPP
+#pragma once
 
 namespace nil {
     namespace crypto3 {
@@ -23,5 +22,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/detail/dynamic_array.hpp b/include/nil/crypto3/multiprecision/detail/dynamic_array.hpp
index f85dd2f8..304be17a 100644
--- a/include/nil/crypto3/multiprecision/detail/dynamic_array.hpp
+++ b/include/nil/crypto3/multiprecision/detail/dynamic_array.hpp
@@ -5,8 +5,7 @@
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
 
-#ifndef BOOST_MP_DETAIL_DYNAMIC_ARRAY_HPP
-#define BOOST_MP_DETAIL_DYNAMIC_ARRAY_HPP
+#pragma once
 
 #include <vector>
 #include <nil/crypto3/multiprecision/detail/rebind.hpp>
@@ -39,5 +38,3 @@ namespace nil {
         }            // namespace multiprecision
     }                // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_DETAIL_DYNAMIC_ARRAY_HPP
diff --git a/include/nil/crypto3/multiprecision/detail/et_ops.hpp b/include/nil/crypto3/multiprecision/detail/et_ops.hpp
index 15b9e1dc..1755daf4 100644
--- a/include/nil/crypto3/multiprecision/detail/et_ops.hpp
+++ b/include/nil/crypto3/multiprecision/detail/et_ops.hpp
@@ -7,8 +7,7 @@
 //  (See accompanying file LICENSE_1_0.txt or copy at
 //  http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_ET_OPS_HPP
-#define BOOST_MP_ET_OPS_HPP
+#pragma once
 
 namespace nil {
     namespace crypto3 {
@@ -1943,5 +1942,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/detail/generic_interconvert.hpp b/include/nil/crypto3/multiprecision/detail/generic_interconvert.hpp
index f9b5e89a..9b67c519 100644
--- a/include/nil/crypto3/multiprecision/detail/generic_interconvert.hpp
+++ b/include/nil/crypto3/multiprecision/detail/generic_interconvert.hpp
@@ -8,8 +8,7 @@
 //  (See accompanying file LICENSE_1_0.txt or copy at
 //  http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_GENERIC_INTERCONVERT_HPP
-#define BOOST_MP_GENERIC_INTERCONVERT_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/detail/default_ops.hpp>
 
@@ -620,5 +619,3 @@ namespace nil {
 #ifdef BOOST_MSVC
 #pragma warning(pop)
 #endif
-
-#endif    // BOOST_MP_GENERIC_INTERCONVERT_HPP
diff --git a/include/nil/crypto3/multiprecision/detail/integer_ops.hpp b/include/nil/crypto3/multiprecision/detail/integer_ops.hpp
index e71df9e3..d21cd9bb 100644
--- a/include/nil/crypto3/multiprecision/detail/integer_ops.hpp
+++ b/include/nil/crypto3/multiprecision/detail/integer_ops.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_INT_FUNC_HPP
-#define BOOST_MP_INT_FUNC_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/number.hpp>
 
@@ -522,5 +521,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/detail/min_max.hpp b/include/nil/crypto3/multiprecision/detail/min_max.hpp
index 057b7060..f202f9a5 100644
--- a/include/nil/crypto3/multiprecision/detail/min_max.hpp
+++ b/include/nil/crypto3/multiprecision/detail/min_max.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_MIN_MAX_HPP
-#define BOOST_MP_MIN_MAX_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/traits/is_backend.hpp>
 
@@ -124,5 +123,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/detail/no_et_ops.hpp b/include/nil/crypto3/multiprecision/detail/no_et_ops.hpp
index ca717ee2..e2782920 100644
--- a/include/nil/crypto3/multiprecision/detail/no_et_ops.hpp
+++ b/include/nil/crypto3/multiprecision/detail/no_et_ops.hpp
@@ -7,8 +7,7 @@
 //  (See accompanying file LICENSE_1_0.txt or copy at
 //  http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_NO_ET_OPS_HPP
-#define BOOST_MP_NO_ET_OPS_HPP
+#pragma once
 
 #ifdef BOOST_MSVC
 #pragma warning(push)
@@ -794,5 +793,3 @@ namespace nil {
 #ifdef BOOST_MSVC
 #pragma warning(pop)
 #endif
-
-#endif    // BOOST_MP_NO_ET_OPS_HPP
diff --git a/include/nil/crypto3/multiprecision/detail/number_base.hpp b/include/nil/crypto3/multiprecision/detail/number_base.hpp
index a89329f2..5d2e1c1f 100644
--- a/include/nil/crypto3/multiprecision/detail/number_base.hpp
+++ b/include/nil/crypto3/multiprecision/detail/number_base.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MATH_BIG_NUM_BASE_HPP
-#define BOOST_MATH_BIG_NUM_BASE_HPP
+#pragma once
 
 #include <limits>
 #include <type_traits>
@@ -1846,5 +1845,3 @@ namespace boost {
 #ifdef BOOST_MSVC
 #pragma warning(pop)
 #endif
-
-#endif    // BOOST_MATH_BIG_NUM_BASE_HPP
diff --git a/include/nil/crypto3/multiprecision/detail/number_compare.hpp b/include/nil/crypto3/multiprecision/detail/number_compare.hpp
index cc4d5e1f..5c562b34 100644
--- a/include/nil/crypto3/multiprecision/detail/number_compare.hpp
+++ b/include/nil/crypto3/multiprecision/detail/number_compare.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_COMPARE_HPP
-#define BOOST_MP_COMPARE_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/traits/is_backend.hpp>
 
@@ -1120,5 +1119,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_COMPARE_HPP
diff --git a/include/nil/crypto3/multiprecision/detail/precision.hpp b/include/nil/crypto3/multiprecision/detail/precision.hpp
index 6289dda7..cffbf0d4 100644
--- a/include/nil/crypto3/multiprecision/detail/precision.hpp
+++ b/include/nil/crypto3/multiprecision/detail/precision.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_PRECISION_HPP
-#define BOOST_MP_PRECISION_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/traits/is_variable_precision.hpp>
 #include <nil/crypto3/multiprecision/detail/number_base.hpp>
@@ -192,5 +191,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_IS_BACKEND_HPP
diff --git a/include/nil/crypto3/multiprecision/detail/rebind.hpp b/include/nil/crypto3/multiprecision/detail/rebind.hpp
index 4f6ffc4a..c0249dce 100644
--- a/include/nil/crypto3/multiprecision/detail/rebind.hpp
+++ b/include/nil/crypto3/multiprecision/detail/rebind.hpp
@@ -5,8 +5,7 @@
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
 
-#ifndef BOOST_MP_DETAIL_REBIND_HPP
-#define BOOST_MP_DETAIL_REBIND_HPP
+#pragma once
 
 namespace nil {
     namespace crypto3 {
@@ -22,5 +21,3 @@ namespace nil {
         }            // namespace multiprecision
     }                // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_DETAIL_REBIND_HPP
diff --git a/include/nil/crypto3/multiprecision/float128.hpp b/include/nil/crypto3/multiprecision/float128.hpp
index f3cf88be..e0345151 100644
--- a/include/nil/crypto3/multiprecision/float128.hpp
+++ b/include/nil/crypto3/multiprecision/float128.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_FLOAT128_HPP
-#define BOOST_MP_FLOAT128_HPP
+#pragma once
 
 #include <boost/config.hpp>
 #include <boost/functional/hash.hpp>
@@ -926,5 +925,3 @@ namespace std {
         nil::crypto3::multiprecision::backends::float128_backend, ExpressionTemplates>>::has_denorm;
 
 }    // namespace std
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/gmp.hpp b/include/nil/crypto3/multiprecision/gmp.hpp
index 0d78ea0f..5a99030e 100644
--- a/include/nil/crypto3/multiprecision/gmp.hpp
+++ b/include/nil/crypto3/multiprecision/gmp.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MATH_ER_GMP_BACKEND_HPP
-#define BOOST_MATH_ER_GMP_BACKEND_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/number.hpp>
 #include <nil/crypto3/multiprecision/debug_adaptor.hpp>
@@ -3080,5 +3079,3 @@ namespace std {
 #endif
 
 }    // namespace std
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/integer.hpp b/include/nil/crypto3/multiprecision/integer.hpp
index 8408196f..8251c756 100644
--- a/include/nil/crypto3/multiprecision/integer.hpp
+++ b/include/nil/crypto3/multiprecision/integer.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_INTEGER_HPP
-#define BOOST_MP_INTEGER_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/cpp_int.hpp>
 #include <nil/crypto3/multiprecision/detail/bitscan.hpp>
@@ -267,5 +266,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/inverse.hpp b/include/nil/crypto3/multiprecision/inverse.hpp
index 5f9b7079..3bc73622 100644
--- a/include/nil/crypto3/multiprecision/inverse.hpp
+++ b/include/nil/crypto3/multiprecision/inverse.hpp
@@ -6,8 +6,7 @@
 // http://www.boost.org/LICENSE_1_0.txt
 //---------------------------------------------------------------------------//
 
-#ifndef BOOST_MULTIPRECISION_INVERSE_HPP
-#define BOOST_MULTIPRECISION_INVERSE_HPP
+#pragma once
 
 #include <boost/container/vector.hpp>
 
@@ -76,5 +75,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/jacobi.hpp b/include/nil/crypto3/multiprecision/jacobi.hpp
index 43445f19..2ab28d2c 100644
--- a/include/nil/crypto3/multiprecision/jacobi.hpp
+++ b/include/nil/crypto3/multiprecision/jacobi.hpp
@@ -7,8 +7,7 @@
 // http://www.boost.org/LICENSE_1_0.txt
 //---------------------------------------------------------------------------//
 
-#ifndef BOOST_MULTIPRECISION_JACOBI_HPP
-#define BOOST_MULTIPRECISION_JACOBI_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/detail/default_ops.hpp>
 
@@ -33,5 +32,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MULTIPRECISION_JACOBI_HPP
diff --git a/include/nil/crypto3/multiprecision/logged_adaptor.hpp b/include/nil/crypto3/multiprecision/logged_adaptor.hpp
index fe37cf1f..576450ea 100644
--- a/include/nil/crypto3/multiprecision/logged_adaptor.hpp
+++ b/include/nil/crypto3/multiprecision/logged_adaptor.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MATH_LOGGED_ADAPTER_HPP
-#define BOOST_MATH_LOGGED_ADAPTER_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/traits/extract_exponent_type.hpp>
 #include <nil/crypto3/multiprecision/detail/integer_ops.hpp>
@@ -614,5 +613,3 @@ namespace boost {
 #undef NON_MEMBER_OP2
 #undef NON_MEMBER_OP3
 #undef NON_MEMBER_OP4
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/miller_rabin.hpp b/include/nil/crypto3/multiprecision/miller_rabin.hpp
index b94ee52f..93477a7d 100644
--- a/include/nil/crypto3/multiprecision/miller_rabin.hpp
+++ b/include/nil/crypto3/multiprecision/miller_rabin.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_MR_HPP
-#define BOOST_MP_MR_HPP
+#pragma once
 
 #include <boost/random.hpp>
 #include <nil/crypto3/multiprecision/integer.hpp>
@@ -183,5 +182,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/modular/base_params.hpp b/include/nil/crypto3/multiprecision/modular/base_params.hpp
index 12a38065..f472fcec 100644
--- a/include/nil/crypto3/multiprecision/modular/base_params.hpp
+++ b/include/nil/crypto3/multiprecision/modular/base_params.hpp
@@ -8,8 +8,7 @@
 // http://www.boost.org/LICENSE_1_0.txt
 //---------------------------------------------------------------------------//
 
-#ifndef BOOST_MULTIPRECISION_BASE_PARAMS_HPP
-#define BOOST_MULTIPRECISION_BASE_PARAMS_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/modular/modular_policy_fixed.hpp>
 
@@ -74,5 +73,4 @@ namespace nil {
             }    // namespace backends
         }        // namespace multiprecision
     }            // namespace crypto3
-}    // namespace nil
-#endif    // BOOST_MULTIPRECISION_BASE_PARAMS_HPP
+}    // namespace nil
\ No newline at end of file
diff --git a/include/nil/crypto3/multiprecision/modular/inverse.hpp b/include/nil/crypto3/multiprecision/modular/inverse.hpp
index a8a86aeb..2bdfa477 100644
--- a/include/nil/crypto3/multiprecision/modular/inverse.hpp
+++ b/include/nil/crypto3/multiprecision/modular/inverse.hpp
@@ -7,8 +7,7 @@
 // http://www.boost.org/LICENSE_1_0.txt
 //---------------------------------------------------------------------------//
 
-#ifndef BOOST_MULTIPRECISION_MODULAR_BACKENDS_INVERSE_HPP
-#define BOOST_MULTIPRECISION_MODULAR_BACKENDS_INVERSE_HPP
+#pragma once
 
 #include <boost/container/vector.hpp>
 #include <boost/type_traits/is_integral.hpp>
@@ -358,5 +357,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/modular/modular_adaptor.hpp b/include/nil/crypto3/multiprecision/modular/modular_adaptor.hpp
index 581a7206..aa10d44b 100644
--- a/include/nil/crypto3/multiprecision/modular/modular_adaptor.hpp
+++ b/include/nil/crypto3/multiprecision/modular/modular_adaptor.hpp
@@ -8,8 +8,7 @@
 // http://www.boost.org/LICENSE_1_0.txt
 //---------------------------------------------------------------------------//
 
-#ifndef BOOST_MULTIPRECISION_MODULAR_ADAPTOR_HPP
-#define BOOST_MULTIPRECISION_MODULAR_ADAPTOR_HPP
+#pragma once
 
 #include <boost/cstdint.hpp>
 #include <boost/functional/hash_fwd.hpp>
@@ -679,5 +678,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/modular/modular_params.hpp b/include/nil/crypto3/multiprecision/modular/modular_params.hpp
index adaf5e4c..2e1cea0f 100644
--- a/include/nil/crypto3/multiprecision/modular/modular_params.hpp
+++ b/include/nil/crypto3/multiprecision/modular/modular_params.hpp
@@ -8,8 +8,7 @@
 // http://www.boost.org/LICENSE_1_0.txt
 //---------------------------------------------------------------------------//
 
-#ifndef BOOST_MULTIPRECISION_MODULAR_PARAMS_HPP
-#define BOOST_MULTIPRECISION_MODULAR_PARAMS_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/modular/montgomery_params.hpp>
 #include <nil/crypto3/multiprecision/modular/barrett_params.hpp>
@@ -107,5 +106,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif    //_MULTIPRECISION_MODULAR_PARAMS_HPP
diff --git a/include/nil/crypto3/multiprecision/modular/montgomery_params.hpp b/include/nil/crypto3/multiprecision/modular/montgomery_params.hpp
index b064ecbc..cbf43ed1 100644
--- a/include/nil/crypto3/multiprecision/modular/montgomery_params.hpp
+++ b/include/nil/crypto3/multiprecision/modular/montgomery_params.hpp
@@ -8,8 +8,7 @@
 // http://www.boost.org/LICENSE_1_0.txt
 //---------------------------------------------------------------------------//
 
-#ifndef BOOST_MULTIPRECISION_MONTGOMERY_PARAMS_HPP
-#define BOOST_MULTIPRECISION_MONTGOMERY_PARAMS_HPP
+#pragma once
 
 #include <boost/container/vector.hpp>
 
@@ -201,5 +200,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/mpc.hpp b/include/nil/crypto3/multiprecision/mpc.hpp
index 0cddd51e..0da84eaa 100644
--- a/include/nil/crypto3/multiprecision/mpc.hpp
+++ b/include/nil/crypto3/multiprecision/mpc.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MULTIPRECISION_MPC_HPP
-#define BOOST_MULTIPRECISION_MPC_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/number.hpp>
 #include <cstdint>
@@ -1299,5 +1298,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/mpfi.hpp b/include/nil/crypto3/multiprecision/mpfi.hpp
index 5b4b0387..3dc0c85c 100644
--- a/include/nil/crypto3/multiprecision/mpfi.hpp
+++ b/include/nil/crypto3/multiprecision/mpfi.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MATH_BN_MPFI_HPP
-#define BOOST_MATH_BN_MPFI_HPP
+#pragma once
 
 #include <algorithm>
 #include <cmath>
@@ -1792,4 +1791,3 @@ namespace std {
         nil::crypto3::multiprecision::mpfi_float_backend<0>, ExpressionTemplates>>::round_style;
 
 }    // namespace std
-#endif
diff --git a/include/nil/crypto3/multiprecision/mpfr.hpp b/include/nil/crypto3/multiprecision/mpfr.hpp
index 0ae234f4..bf8f522d 100644
--- a/include/nil/crypto3/multiprecision/mpfr.hpp
+++ b/include/nil/crypto3/multiprecision/mpfr.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MATH_BN_MPFR_HPP
-#define BOOST_MATH_BN_MPFR_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/number.hpp>
 #include <nil/crypto3/multiprecision/debug_adaptor.hpp>
@@ -2936,4 +2935,3 @@ namespace std {
         nil::crypto3::multiprecision::mpfr_float_backend<0>, ExpressionTemplates>>::round_style;
 
 }    // namespace std
-#endif
diff --git a/include/nil/crypto3/multiprecision/number.hpp b/include/nil/crypto3/multiprecision/number.hpp
index 79cc1efa..aa716b56 100644
--- a/include/nil/crypto3/multiprecision/number.hpp
+++ b/include/nil/crypto3/multiprecision/number.hpp
@@ -7,8 +7,7 @@
 //  (See accompanying file LICENSE_1_0.txt or copy at
 //  http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MATH_EXTENDED_REAL_HPP
-#define BOOST_MATH_EXTENDED_REAL_HPP
+#pragma once
 
 #include <boost/config.hpp>
 #include <cstdint>
@@ -2364,5 +2363,3 @@ struct std::hash<boost::rational<nil::crypto3::multiprecision::number<Backend, E
     };
 
 #include <nil/crypto3/multiprecision/detail/ublas_interop.hpp>
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/random.hpp b/include/nil/crypto3/multiprecision/random.hpp
index 2cb3c2bc..883422ba 100644
--- a/include/nil/crypto3/multiprecision/random.hpp
+++ b/include/nil/crypto3/multiprecision/random.hpp
@@ -5,8 +5,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_RANDOM_HPP
-#define BOOST_MP_RANDOM_HPP
+#pragma once
 
 #if defined(__GNUC__) || defined(_MSC_VER)
 #pragma message( \
@@ -14,5 +13,3 @@
 #endif
 
 #include <boost/random.hpp>
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/rational_adaptor.hpp b/include/nil/crypto3/multiprecision/rational_adaptor.hpp
index 1be302b0..79066e79 100644
--- a/include/nil/crypto3/multiprecision/rational_adaptor.hpp
+++ b/include/nil/crypto3/multiprecision/rational_adaptor.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MATH_RATIONAL_ADAPTER_HPP
-#define BOOST_MATH_RATIONAL_ADAPTER_HPP
+#pragma once
 
 #include <iostream>
 #include <iomanip>
@@ -373,5 +372,3 @@ namespace std {
                                                             ExpressionTemplates>>::is_exact;
 
 }    // namespace std
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/ressol.hpp b/include/nil/crypto3/multiprecision/ressol.hpp
index 91399c75..ddba244a 100644
--- a/include/nil/crypto3/multiprecision/ressol.hpp
+++ b/include/nil/crypto3/multiprecision/ressol.hpp
@@ -8,8 +8,7 @@
 // http://www.boost.org/LICENSE_1_0.txt
 //---------------------------------------------------------------------------//
 
-#ifndef BOOST_MULTIPRECISION_RESSOL_HPP
-#define BOOST_MULTIPRECISION_RESSOL_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/jacobi.hpp>
 #include <nil/crypto3/multiprecision/detail/default_ops.hpp>
@@ -337,5 +336,3 @@ namespace nil {
         }    // namespace multiprecision
     }        // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MULTIPRECISION_RESSOL_HPP
diff --git a/include/nil/crypto3/multiprecision/tommath.hpp b/include/nil/crypto3/multiprecision/tommath.hpp
index ce05e26b..b0e39921 100644
--- a/include/nil/crypto3/multiprecision/tommath.hpp
+++ b/include/nil/crypto3/multiprecision/tommath.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MATH_MP_TOMMATH_BACKEND_HPP
-#define BOOST_MATH_MP_TOMMATH_BACKEND_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/number.hpp>
 #include <nil/crypto3/multiprecision/rational_adaptor.hpp>
@@ -875,5 +874,3 @@ namespace std {
         nil::crypto3::multiprecision::tommath_int, ExpressionTemplates>>::round_style;
 
 }    // namespace std
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/traits/explicit_conversion.hpp b/include/nil/crypto3/multiprecision/traits/explicit_conversion.hpp
index a84ee7a5..69bbeae8 100644
--- a/include/nil/crypto3/multiprecision/traits/explicit_conversion.hpp
+++ b/include/nil/crypto3/multiprecision/traits/explicit_conversion.hpp
@@ -4,8 +4,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_EXPLICIT_CONVERTIBLE_HPP
-#define BOOST_MP_EXPLICIT_CONVERTIBLE_HPP
+#pragma once
 
 #include <boost/config.hpp>
 #include <nil/crypto3/multiprecision/detail/number_base.hpp>    // number_category
@@ -62,5 +61,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/traits/is_backend.hpp b/include/nil/crypto3/multiprecision/traits/is_backend.hpp
index 1fcf9389..eccf92b8 100644
--- a/include/nil/crypto3/multiprecision/traits/is_backend.hpp
+++ b/include/nil/crypto3/multiprecision/traits/is_backend.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_IS_BACKEND_HPP
-#define BOOST_MP_IS_BACKEND_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/detail/number_base.hpp>
 
@@ -87,5 +86,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_IS_BACKEND_HPP
diff --git a/include/nil/crypto3/multiprecision/traits/is_byte_container.hpp b/include/nil/crypto3/multiprecision/traits/is_byte_container.hpp
index 597284cb..071215c2 100644
--- a/include/nil/crypto3/multiprecision/traits/is_byte_container.hpp
+++ b/include/nil/crypto3/multiprecision/traits/is_byte_container.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_IS_BYTE_CONTAINER_HPP
-#define BOOST_IS_BYTE_CONTAINER_HPP
+#pragma once
 
 #include <iterator>
 #include <type_traits>
@@ -43,5 +42,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_IS_BYTE_CONTAINER_HPP
diff --git a/include/nil/crypto3/multiprecision/traits/is_complex.hpp b/include/nil/crypto3/multiprecision/traits/is_complex.hpp
index 91009fbf..490e9fd0 100644
--- a/include/nil/crypto3/multiprecision/traits/is_complex.hpp
+++ b/include/nil/crypto3/multiprecision/traits/is_complex.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_IS_COMPLEX_HPP
-#define BOOST_MP_IS_COMPLEX_HPP
+#pragma once
 
 #include <type_traits>
 #include <complex>
@@ -24,5 +23,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_IS_BACKEND_HPP
diff --git a/include/nil/crypto3/multiprecision/traits/is_restricted_conversion.hpp b/include/nil/crypto3/multiprecision/traits/is_restricted_conversion.hpp
index 8d1f2cf7..93d8d6c5 100644
--- a/include/nil/crypto3/multiprecision/traits/is_restricted_conversion.hpp
+++ b/include/nil/crypto3/multiprecision/traits/is_restricted_conversion.hpp
@@ -4,8 +4,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_RESTRICTED_CONVERSION_HPP
-#define BOOST_MP_RESTRICTED_CONVERSION_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/traits/explicit_conversion.hpp>
 #include <nil/crypto3/multiprecision/detail/number_base.hpp>
@@ -45,5 +44,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_RESTRICTED_CONVERSION_HPP
diff --git a/include/nil/crypto3/multiprecision/traits/is_variable_precision.hpp b/include/nil/crypto3/multiprecision/traits/is_variable_precision.hpp
index 8d984f5d..35853baf 100644
--- a/include/nil/crypto3/multiprecision/traits/is_variable_precision.hpp
+++ b/include/nil/crypto3/multiprecision/traits/is_variable_precision.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_IS_VARIABLE_PRECISION_HPP
-#define BOOST_MP_IS_VARIABLE_PRECISION_HPP
+#pragma once
 
 #include <nil/crypto3/multiprecision/detail/number_base.hpp>
 
@@ -24,5 +23,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_IS_BACKEND_HPP
diff --git a/include/nil/crypto3/multiprecision/traits/std_integer_traits.hpp b/include/nil/crypto3/multiprecision/traits/std_integer_traits.hpp
index 2cbc533e..586e6f9e 100644
--- a/include/nil/crypto3/multiprecision/traits/std_integer_traits.hpp
+++ b/include/nil/crypto3/multiprecision/traits/std_integer_traits.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MP_STD_INTEGER_TRAITS_HPP
-#define BOOST_MP_STD_INTEGER_TRAITS_HPP
+#pragma once
 
 #include <type_traits>
 
@@ -68,5 +67,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif
diff --git a/include/nil/crypto3/multiprecision/traits/transcendental_reduction_type.hpp b/include/nil/crypto3/multiprecision/traits/transcendental_reduction_type.hpp
index 88c117ca..aaaabc36 100644
--- a/include/nil/crypto3/multiprecision/traits/transcendental_reduction_type.hpp
+++ b/include/nil/crypto3/multiprecision/traits/transcendental_reduction_type.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_MP_TRANS_RED_TYPE_HPP
-#define BOOST_MP_TRANS_RED_TYPE_HPP
+#pragma once
 
 namespace nil {
     namespace crypto3 {
@@ -20,5 +19,3 @@ namespace nil {
         }        // namespace multiprecision
     }            // namespace crypto3
 }    // namespace nil
-
-#endif    // BOOST_MP_TRANS_RED_TYPE_HPP
diff --git a/performance/arithmetic_backend.hpp b/performance/arithmetic_backend.hpp
index 38b3cdd0..e8a69d84 100644
--- a/performance/arithmetic_backend.hpp
+++ b/performance/arithmetic_backend.hpp
@@ -3,8 +3,7 @@
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
 
-#ifndef BOOST_MATH_FLOAT_BACKEND_HPP
-#define BOOST_MATH_FLOAT_BACKEND_HPP
+#pragma once
 
 #include <iostream>
 #include <iomanip>
@@ -664,5 +663,3 @@ class numeric_limits<boost::math::concepts::real_concept> : public std::numeric_
 } // namespace std
 
 #include <nil/crypto3/multiprecision/detail/integer_ops.hpp>
-
-#endif