diff --git a/CMakeLists.txt b/CMakeLists.txt
index b006337..b5c6180 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,6 +39,16 @@ set(WOLFSSL_ALT_NAMES ON CACHE BOOL "" FORCE)
 FetchContent_GetProperties(wolfssl)
 FetchContent_MakeAvailable(wolfssl)
 
+# ---------------------
+# warnings
+# ---------------------
+add_library(tinymitm-warnings INTERFACE)
+if(CMAKE_GENERATOR MATCHES "Visual Studio")
+    target_compile_options(tinymitm-warnings INTERFACE /W4 /WX)
+else()
+    target_compile_options(tinymitm-warnings INTERFACE -Wall -Wextra -Werror)
+endif()
+
 # ------------------------------
 # proxy
 # ------------------------------
@@ -46,7 +56,7 @@ file(GLOB_RECURSE TINYMITM_SOURCES CONFIGURE_DEPENDS "src/proxy/*.cpp" "src/prox
 add_library(tinymitm STATIC ${TINYMITM_SOURCES})
 target_include_directories(tinymitm PUBLIC src/proxy)
 target_compile_features(tinymitm PUBLIC cxx_std_20)
-target_link_libraries(tinymitm PRIVATE wolfssl)
+target_link_libraries(tinymitm PRIVATE tinymitm-warnings wolfssl)
 target_link_libraries(tinymitm PUBLIC seallib)
 set_target_properties(tinymitm PROPERTIES CXX_EXTENSIONS OFF)
 
@@ -57,5 +67,5 @@ if (TINYMITM_TEST)
     file(GLOB_RECURSE TINYMITM_TEST_SOURCES CONFIGURE_DEPENDS "src/test/*.h" "src/test/*.cpp")
     add_executable(tinymitm-test ${TINYMITM_TEST_SOURCES})
     target_include_directories(tinymitm-test PRIVATE "src/test")
-    target_link_libraries(tinymitm-test PRIVATE tinymitm)
+    target_link_libraries(tinymitm-test PRIVATE tinymitm-warnings tinymitm)
 endif()
\ No newline at end of file