diff --git a/build.bat b/build.bat
index 9df153b..b787779 100644
--- a/build.bat
+++ b/build.bat
@@ -2,4 +2,4 @@ python embed.py
 7z a -tzip -mx=9 cyzg.zip main.py backend.py ./components/*.py
 REM 7z a -tzip -mx=9 data.db.zip data.db
 timeout /t 1 >nul
-gcc -O2 -s main.c -o cyzg.exe -Wl,--gc-sections -Wl,--strip-all
+gcc -Os -s main.c -o cyzg.exe -Wl,--gc-sections -Wl,--strip-all