diff --git a/CMakeLists.txt b/CMakeLists.txt
index 63cd0516..bc66279e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -62,16 +62,11 @@ message("CMAKE_CXX_FLAGS_RELEASE is ${CMAKE_CXX_FLAGS_RELEASE}")
 message("CMAKE_CXX_FLAGS_RELWITHDEBINFO is ${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
 message("CMAKE_CXX_FLAGS_MINSIZEREL is ${CMAKE_CXX_FLAGS_MINSIZEREL}")
 
-if (WIN32)
-	set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   /MP /wd4200")
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /wd4200 /std:c++14")
-else ()
-	set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall -fPIC -pipe -std=gnu90")
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=c++11 -fno-exceptions -Wno-invalid-offsetof")
-	if (APPLE)
-		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations")
-	endif()
-endif ()
+set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall -fPIC -pipe -std=gnu90")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=c++11 -fno-exceptions -Wno-invalid-offsetof")
+if (APPLE)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations")
+endif()
 
 add_subdirectory(src)
 
diff --git a/benchmark/CMakeLists.txt b/benchmark/CMakeLists.txt
index 8a2f6f1b..6a6180c7 100644
--- a/benchmark/CMakeLists.txt
+++ b/benchmark/CMakeLists.txt
@@ -15,16 +15,11 @@ include_directories(${OPENSSL_INCLUDE_DIR} ${WORKFLOW_INCLUDE_DIR})
 link_directories(${WORKFLOW_LIB_DIR})
 find_library(WORKFLOW_LIB NAMES libworkflow.a workflow HINTS ${WORKFLOW_LIB_DIR})
 
-if (WIN32)
-		set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   /MP /wd4200")
-		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /wd4200 /std:c++14")
-else ()
-		set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall -fPIC -pipe -std=gnu90")
-		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=c++11 -fno-exceptions -Wno-invalid-offsetof")
-		if (APPLE)
-			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations")
-		endif()
-endif ()
+set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall -fPIC -pipe -std=gnu90")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=c++11 -fno-exceptions -Wno-invalid-offsetof")
+if (APPLE)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations")
+endif()
 
 set(BENCHMARK_LIST
 	benchmark-01-http_server
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 92b0113f..e9344b64 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -24,16 +24,11 @@ set(CXX_STD "c++14")
 
 find_package(GTest REQUIRED)
 
-if (WIN32)
-		set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   /MP /wd4200")
-		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /wd4200 /std:c++14")
-else ()
-		set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall -fPIC -pipe -std=gnu90")
-		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=${CXX_STD} -fno-exceptions")
-		if (APPLE)
-			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations")
-		endif()
-endif ()
+set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall -fPIC -pipe -std=gnu90")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=${CXX_STD} -fno-exceptions")
+if (APPLE)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations")
+endif()
 
 set(TEST_LIST
 	task_unittest
diff --git a/tutorial/CMakeLists.txt b/tutorial/CMakeLists.txt
index 09de3148..40de2f86 100644
--- a/tutorial/CMakeLists.txt
+++ b/tutorial/CMakeLists.txt
@@ -25,16 +25,11 @@ if (KAFKA STREQUAL "y")
 	find_library(WFKAFKA_LIB NAMES libwfkafka.a wfkafka HINTS ${WORKFLOW_LIB_DIR})
 endif ()
 
-if (WIN32)
-		set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   /MP /wd4200")
-		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /wd4200 /std:c++14")
-else ()
-		set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall -fPIC -pipe -std=gnu90")
-		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=c++11 -fno-exceptions")
-		if (APPLE)
-			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations")
-		endif()
-endif ()
+set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall -fPIC -pipe -std=gnu90")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=c++11 -fno-exceptions")
+if (APPLE)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations")
+endif()
 
 set(TUTORIAL_LIST
 	tutorial-00-helloworld