diff --git a/.github/actions/cmake/action.yml b/.github/actions/cmake/action.yml
index a946f535..3bb00ea1 100644
--- a/.github/actions/cmake/action.yml
+++ b/.github/actions/cmake/action.yml
@@ -10,6 +10,7 @@ runs:
         run: |
           cmake -LA .. \
             -DCMAKE_BUILD_TYPE=${BUILD_TYPE} \
-            -DPROTOZERO_DATA_VIEW=$PROTOZERO_DATA_VIEW
+            -DPROTOZERO_DATA_VIEW=${PROTOZERO_DATA_VIEW} \
+            -DCMAKE_CXX_STANDARD=${CPP_VERSION}
         shell: bash
         working-directory: build
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3d33584e..b02b4caa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,20 +22,26 @@ jobs:
           - "fedora:35"           # gcc 11.2.1, clang 13.0.0, cmake 3.22.0
         build_type: [Debug]
         cpp_compiler: [g++]
-        cpp_version: [c++11]
+        cpp_version: [11]
         include:
           - image: "debian:bullseye"
-            cpp_version: c++17
+            cpp_version: 14
           - image: "debian:bullseye"
-            cpp_version: c++20
+            cpp_version: 17
+          - image: "debian:bullseye"
+            cpp_version: 20
+          - image: "debian:bullseye"
+            c_compiler: clang
+            cpp_compiler: clang++
+            cpp_version: 14
           - image: "debian:bullseye"
             c_compiler: clang
             cpp_compiler: clang++
-            cpp_version: c++17
+            cpp_version: 17
           - image: "debian:bullseye"
             c_compiler: clang
             cpp_compiler: clang++
-            cpp_version: c++20
+            cpp_version: 20
           - image: "debian:bullseye"
             build_type: Release
           - image: "debian:bullseye"
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 25112e76..03891ace 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,6 +16,15 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 #-----------------------------------------------------------------------------
 
+if (NOT "${CMAKE_CXX_STANDARD}")
+    set(CMAKE_CXX_STANDARD 11)
+endif()
+message(STATUS "Building in C++${CMAKE_CXX_STANDARD} mode")
+set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+#-----------------------------------------------------------------------------
+
 option(BUILD_TESTING "Build tests" ON)
 option(WERROR "Add -Werror flag to build (turns warnings into errors)" ON)
 
@@ -23,7 +32,7 @@ if(MSVC)
     add_compile_options(/W3)
     add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS)
 else()
-    add_compile_options(-std=c++11 -Wall -Wextra -pedantic -Wsign-compare -Wunused-parameter -Wno-float-equal -Wno-covered-switch-default)
+    add_compile_options(-Wall -Wextra -pedantic -Wsign-compare -Wunused-parameter -Wno-float-equal -Wno-covered-switch-default)
     if(WERROR)
         add_compile_options(-Werror)
     endif()