diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 466fb29304..59caf0233b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -204,7 +204,7 @@ endif()
 apply_libxml2_settings(cellml)
 
 # Use target compile features to propagate features to consuming projects.
-target_compile_features(cellml PUBLIC cxx_std_17)
+target_compile_features(cellml PUBLIC cxx_std_20)
 
 set_target_properties(cellml PROPERTIES
   CXX_VISIBILITY_PRESET hidden
@@ -229,7 +229,7 @@ set(DEBUG_HEADER_FILES
 
 add_library(cellml_debug_utilities STATIC ${DEBUG_SOURCE_FILES} ${DEBUG_HEADER_FILES})
 
-target_compile_features(cellml_debug_utilities PUBLIC cxx_std_17)
+target_compile_features(cellml_debug_utilities PUBLIC cxx_std_20)
 
 target_include_directories(cellml_debug_utilities
   PUBLIC
diff --git a/src/bindings/javascript/CMakeLists.txt b/src/bindings/javascript/CMakeLists.txt
index db8a68e01c..046f6be52d 100644
--- a/src/bindings/javascript/CMakeLists.txt
+++ b/src/bindings/javascript/CMakeLists.txt
@@ -40,7 +40,7 @@ target_link_libraries(javascript-bindings PUBLIC cellml)
 # I want to add '-fwasm-exceptions' to the COMPILE_FLAGS but Node doesn't support
 # this yet.  This is a reminder to enable it when Node does support exceptions.
 set_target_properties(javascript-bindings PROPERTIES
-  CXX_STANDARD 11
+  CXX_STANDARD 20
   CXX_STANDARD_REQUIRED ON
   CXX_VISIBILITY_PRESET hidden
   VISIBILITY_INLINES_HIDDEN 0
diff --git a/tests/api_headers/api_header_test.in.cmake b/tests/api_headers/api_header_test.in.cmake
index 14cc0b88c5..bc94cb6417 100644
--- a/tests/api_headers/api_header_test.in.cmake
+++ b/tests/api_headers/api_header_test.in.cmake
@@ -3,7 +3,7 @@ add_executable(${CURRENT_TEST} ${TEST_SRC})
 target_link_libraries(${CURRENT_TEST} cellml gtest_main)
 
 set_target_properties(${CURRENT_TEST} PROPERTIES
-  CXX_STANDARD 11
+  CXX_STANDARD 20
   CXX_STANDARD_REQUIRED ON
   FOLDER tests)