diff --git a/package.json b/package.json
index 3c25f63..565263a 100644
--- a/package.json
+++ b/package.json
@@ -6,8 +6,8 @@
   "scripts": {
     "build": "npm run build:props && npm run build:css && npm run build:eleventy",
     "build:props": "node scripts/custom-props.js",
-    "build:css": "postcss src/css/styles.css --base src --dir _site/assets",
-    "build:eleventy": "eleventy",
+    "build:css": "npx postcss src/css/styles.css --base src --dir _site/assets",
+    "build:eleventy": "npx eleventy",
     "serve": "run-p \"serve:*\"",
     "serve:props": "node scripts/custom-props.js",
     "serve:css": "postcss src/css/styles.css --base src --dir _site/assets -w",