diff --git a/.github/workflows/deploy-github-pages.yml b/.github/workflows/deploy-github-pages.yml
index 5107d3b..539a304 100644
--- a/.github/workflows/deploy-github-pages.yml
+++ b/.github/workflows/deploy-github-pages.yml
@@ -54,10 +54,6 @@ jobs:
       - name: Install Node.js dependencies
         run: "[[ -f package-lock.json || -f npm-shrinkwrap.json ]] && npm ci || true"
 
-      - name: Install Node.js dependencies
-        run: |
-          npm install -g postcss postcss-cli autoprefixer
-
       - name: Install PostCSS
         run: npm install -g postcss postcss-cli autoprefixer
 
diff --git a/package.json b/package.json
index dd1b5bf..ef4546e 100644
--- a/package.json
+++ b/package.json
@@ -48,5 +48,8 @@
   "prettier": {
     "proseWrap": "always",
     "singleQuote": true
+  },
+  "dependencies": {
+    "postcss": "^8.4.49"
   }
 }