diff --git a/src/ast/AST.ts b/src/ast/AST.ts
index 65a4308..ed3276a 100644
--- a/src/ast/AST.ts
+++ b/src/ast/AST.ts
@@ -1,3 +1,5 @@
+// This file is based on code from https://github.com/scaleton-labs/tvm-disassembler
+
 import {
     BlockNode,
     InstructionNode,
diff --git a/src/ast/nodes.ts b/src/ast/nodes.ts
index a63fb75..b786bbe 100644
--- a/src/ast/nodes.ts
+++ b/src/ast/nodes.ts
@@ -1,3 +1,5 @@
+// This file is based on code from https://github.com/scaleton-labs/tvm-disassembler
+
 import {Cell} from '@ton/core';
 import {OpCode} from '../codepage/opcodes.gen';
 
diff --git a/src/decompiler/decompileAll.ts b/src/decompiler/decompileAll.ts
index 403bd55..6d3c4ba 100644
--- a/src/decompiler/decompileAll.ts
+++ b/src/decompiler/decompileAll.ts
@@ -1,3 +1,5 @@
+// This file is based on code from https://github.com/scaleton-labs/tvm-disassembler
+
 import {Cell, Dictionary, DictionaryValue} from "@ton/core";
 import {decompile} from "./decompiler";
 import {debugSymbols} from "./knownMethods";