diff --git a/minify.py b/minify.py
index 99e1a90..49cb390 100755
--- a/minify.py
+++ b/minify.py
@@ -11,7 +11,7 @@ DEPLOY_DIR = Path("./deploy")
 
 def minify_css(content):
     result = subprocess.run(
-        ["cleancss"],
+        ["cleancss", "--level", "1"],
         input=content,
         capture_output=True,
         text=True,