diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f87f92d..cba41204 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -145,13 +145,18 @@ if ("${CMAKE_BUILD_TYPE}" STREQUAL "")
 endif()
 
 
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_CXX_STANDARD 11)
+
+
 # https://cmake.org/cmake/help/latest/variable/CMAKE_LANG_COMPILER_ID.html
 if (CMAKE_CXX_COMPILER_ID MATCHES GNU)
 
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -maes -Wall -Wno-strict-aliasing")
     set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -Ofast -funroll-loops -fvariable-expansion-in-unroller -ftree-loop-if-convert-stores -fmerge-all-constants -fbranch-target-load-optimize2")
 
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -maes -Wall -std=c++14 -fno-exceptions -fno-rtti")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -maes -Wall -fno-exceptions -fno-rtti")
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Ofast -s -funroll-loops -fvariable-expansion-in-unroller -ftree-loop-if-convert-stores -fmerge-all-constants -fbranch-target-load-optimize2")
 
     if (WIN32)
@@ -176,7 +181,7 @@ elseif (CMAKE_CXX_COMPILER_ID MATCHES Clang)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -maes -Wall")
     set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -Ofast -funroll-loops -fmerge-all-constants")
 
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -maes -Wall -std=c++14 -fno-exceptions -fno-rtti")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -maes -Wall -fno-exceptions -fno-rtti")
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Ofast -funroll-loops -fmerge-all-constants")
 
 endif()