diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 5f491da..9b97562 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -20,7 +20,7 @@ jobs:
           coverage: none
 
       - name: Install composer dependencies
-        uses: ramsey/composer-install@a8d0d959dab41457692a5e2041bd9b757a119e3f # 3.2.1
+        uses: ramsey/composer-install@65e4f84970763564f46a70b8a54b90d033b3bdda # 4.0.0
 
       - name: Run PHPStan
         run: ./vendor/bin/phpstan --error-format=github