diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d5bf6b6..f8c6961 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -78,7 +78,7 @@ jobs:
                     coverage: pcov
 
             -   name: Composer install
-                uses: ramsey/composer-install@v3
+                uses: ramsey/composer-install@v4
                 with:
                     dependency-versions: ${{ matrix.dependencies }}
                     composer-options: ${{ matrix.composer-options }}
@@ -126,7 +126,7 @@ jobs:
                     tools: phive, cs2pr
 
             -   name: Composer install
-                uses: ramsey/composer-install@v3
+                uses: ramsey/composer-install@v4
 
             -   name: Install PHP tools with phive.
                 run: "phive install --trust-gpg-keys 'CF1A108D0E7AE720,51C67305FFC2E5C0,99BF4D9A33D65E1E'"