diff --git a/.github/workflows/composer-normalize.yml b/.github/workflows/composer-normalize.yml
new file mode 100644
index 00000000..560c42b1
--- /dev/null
+++ b/.github/workflows/composer-normalize.yml
@@ -0,0 +1,22 @@
+name: normalize composer.json
+
+on:
+  push:
+    paths:
+      - 'composer.json'
+
+jobs:
+  normalize:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Git checkout
+        uses: actions/checkout@v2
+
+      - name: normalize composer.json
+        run: |
+          composer global require ergebnis/composer-normalize
+          composer normalize
+
+      - uses: stefanzweifel/git-auto-commit-action@v4.0.0
+        with:
+          commit_message: normalize composer.json