diff --git a/src/Makefile b/src/Makefile
index 6b8b5f4..a909cc1 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,5 +1,5 @@
 clean:
-	rm css/*
+	rm -rf css/*
 
 css:
 	sass scss:css