diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ae3229a..16bac60 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,7 +34,7 @@ jobs:
           ini-values: "zend.assertions=1"
 
       - name: "Install dependencies with Composer"
-        uses: "ramsey/composer-install@v2"
+        uses: "ramsey/composer-install@4.0.0"
         with:
           dependency-versions: "${{ matrix.dependencies }}"