diff --git a/example/cpp03/CMakeLists.txt b/example/cpp03/CMakeLists.txt
index 8f73a80a..6c384fa7 100644
--- a/example/cpp03/CMakeLists.txt
+++ b/example/cpp03/CMakeLists.txt
@@ -33,7 +33,7 @@ FOREACH (source_file ${exec_PROGRAMS})
         ${source_file}
     )
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-std=c++03 -Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
     ENDIF ()
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
         IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
@@ -54,7 +54,7 @@ FOREACH (source_file ${with_pthread_PROGRAMS})
         pthread
     )
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-std=c++03 -Wall -Wextra -Werror -Wno-mismatched-tags -g -O3 -pthread")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3 -pthread")
     ENDIF ()
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
         IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
@@ -87,7 +87,7 @@ FOREACH (source_file ${with_boost_lib_PROGRAMS})
         )
     ENDIF ()
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-std=c++03 -Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
     ENDIF ()
     IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
         IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
diff --git a/example/cpp11/CMakeLists.txt b/example/cpp11/CMakeLists.txt
index cdbc7e07..25211ea3 100644
--- a/example/cpp11/CMakeLists.txt
+++ b/example/cpp11/CMakeLists.txt
@@ -15,7 +15,7 @@ IF (MSGPACK_CXX11)
             ${source_file}
         )
         IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-            SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-std=c++11 -Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
+            SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
         ENDIF ()
         IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
             IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")