diff --git a/.github/workflows/reusable-phpstan.yml b/.github/workflows/reusable-phpstan.yml
index 7e738c5..bdab65f 100644
--- a/.github/workflows/reusable-phpstan.yml
+++ b/.github/workflows/reusable-phpstan.yml
@@ -58,7 +58,7 @@ jobs:
       # @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
       - name: Install Composer dependencies
         if: ${{ steps.has_config.outputs.files_exists == 'true' }}
-        uses: "ramsey/composer-install@3cf229dc2919194e9e36783941438d17239e8520" # 3.1.1
+        uses: "ramsey/composer-install@65e4f84970763564f46a70b8a54b90d033b3bdda" # 4.0.0
         with:
           # Bust the cache at least once a month - output format: YYYY-MM.
           custom-cache-suffix: $(date -u "+%Y-%m")