diff --git a/package.json b/package.json
index eb032c7e..9ccacb33 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
         "build:ssr": "nx build --prod && nx run demo:server:production",
         "prerender": "nx run demo:prerender",
         "build": "nx build demo",
-        "prettier": "prettier '**/*.{svg,yml,js,ts,html,md,less,json}'",
+        "prettier": "prettier !package-lock.json .  --ignore-path .gitignore",
         "test": "nx test ng-polymorpheus",
         "lint": "nx lint demo",
         "typecheck": "tsc --noEmit --skipLibCheck"