diff --git a/.github/workflows/cs.yml b/.github/workflows/cs.yml
index fd6b61be..ddbd6bcd 100644
--- a/.github/workflows/cs.yml
+++ b/.github/workflows/cs.yml
@@ -29,7 +29,7 @@ jobs:
       # Install dependencies and handle caching in one go.
       # @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
       - name: Install Composer dependencies
-        uses: "ramsey/composer-install@v3"
+        uses: "ramsey/composer-install@v4"
         with:
           # Bust the cache at least once a month - output format: YYYY-MM-DD.
           custom-cache-suffix: $(date -u -d "-0 month -$(($(date +%d)-1)) days" "+%F")
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9adeff03..64282aa4 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -152,7 +152,7 @@ jobs:
       # @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
       - name: Install Composer dependencies - normal
         if: ${{ steps.composer_toggle.outputs.TYPE == '1' || steps.composer_toggle.outputs.TYPE == '3' }}
-        uses: "ramsey/composer-install@v3"
+        uses: "ramsey/composer-install@v4"
         with:
           # Bust the cache at least once a month - output format: YYYY-MM-DD.
           custom-cache-suffix: $(date -u -d "-0 month -$(($(date +%d)-1)) days" "+%F")
@@ -160,7 +160,7 @@ jobs:
       # For PHP 8.0 and above on WP 5.2 - 5.8, we need to install with ignore platform reqs as not all dependencies allow it.
       - name: Install Composer dependencies with ignore platform reqs
         if: ${{ steps.composer_toggle.outputs.TYPE == '2' || steps.composer_toggle.outputs.TYPE == '4' }}
-        uses: "ramsey/composer-install@v3"
+        uses: "ramsey/composer-install@v4"
         with:
           composer-options: --ignore-platform-req=php
           custom-cache-suffix: $(date -u -d "-0 month -$(($(date +%d)-1)) days" "+%F")