diff --git a/CMakeLists.txt b/CMakeLists.txt
index ba507c2d..4090ea75 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,7 @@ execute_process(
 
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY bin)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY lib)
-set(CMAKE_C_FLAGS "-std=c99")
+set(CMAKE_C_FLAGS "-Wall -Wextra -std=c99")
 set(CMAKE_C_FLAGS_DEBUG "-DDEBUG=1")
 
 # external libraries