diff --git a/CMakeLists.txt b/CMakeLists.txt
index 16deb91..c79e705 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,6 +34,23 @@ set( CMAKE_CXX_STANDARD 11 )
 set( CMAKE_CXX_STANDARD_REQUIRED ON )
 set( CMAKE_CXX_EXTENSIONS OFF )
 
+add_compile_options(
+	"$<$<COMPILE_LANG_AND_ID:CXX,GNU>:-Wall;-Wconversion;-Wno-sign-conversion;-Wextra>"
+	"$<$<COMPILE_LANG_AND_ID:CXX,MSVC>:/W3;-D_CRT_SECURE_NO_WARNINGS=1>"
+
+	# Debug
+	"$<$<CONFIG:Debug>:$<$<COMPILE_LANG_AND_ID:CXX,GNU>:-O0;-g>>"
+	"$<$<CONFIG:Debug>:$<$<COMPILE_LANG_AND_ID:CXX,MSVC>:/Od;/Zi>>"
+
+	# Release
+	"$<$<CONFIG:Release>:$<$<COMPILE_LANG_AND_ID:CXX,GNU>:-O3>>"
+	"$<$<CONFIG:Release>:$<$<COMPILE_LANG_AND_ID:CXX,MSVC>:/O2>>"
+
+	# MinSizeRel
+	"$<$<CONFIG:MinSizeRel>:$<$<COMPILE_LANG_AND_ID:CXX,GNU>:-Os>>"
+	"$<$<CONFIG:MinSizeRel>:$<$<COMPILE_LANG_AND_ID:CXX,MSVC>:/O1>>"
+)
+
 # OpenSSL 3.0 deprecates some functions we use.
 # Adding this flag makes the compiler not spam warnings.
 add_compile_options(-D OPENSSL_API_COMPAT=0x10100000L)