diff --git a/piston b/piston
index 8fafd98..f58fd78 100755
--- a/piston
+++ b/piston
@@ -11,7 +11,7 @@ case $1 in
         ;;
     update)
         git pull
-        docker-compose build api
+        docker-compose pull api
         docker-compose up -d api
         ;;
     clean-pkgs)