diff --git a/update_containers.sh b/update_containers.sh
index e1046b7..2893173 100755
--- a/update_containers.sh
+++ b/update_containers.sh
@@ -18,4 +18,4 @@ docker-compose down && docker-compose pull && docker-compose up -d
 cd /opt/docker/wordpress
 docker-compose down && docker-compose pull && docker-compose up -d
 
-docker image prune -f
+docker image prune -a -f