diff --git a/update.sh b/update.sh
index 8774f2fe..0ca15706 100755
--- a/update.sh
+++ b/update.sh
@@ -1,5 +1,6 @@
 #!/bin/sh
 
 cd "$(dirname "$0")"
+rm web/css/*
 git checkout master && git pull
 sass --update web/scss:web/css --style compressed -E "UTF-8"