diff --git a/package.json b/package.json
index 219b6fe2..2d991652 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,8 @@
     "tools:serve": "python3 tools/server.py || python tools/server.py",
     "tools": "npm run build && npm run tools:serve",
     "pretools:watch": "npm run build",
-    "tools:watch": "npm-run-all  --parallel tools:serve \"build:* -- --watch\""
+    "tools:watch": "npm-run-all  --parallel tools:serve \"build:* -- --watch\"",
+    "prettier": "prettier {src/**/*.ts,tests/**/*.ts,doc/**/*.md} --write"
   },
   "repository": {
     "type": "git",