diff --git a/.github/workflows/cp-phpunit.yml b/.github/workflows/cp-phpunit.yml
index 8607e06..e9114ad 100644
--- a/.github/workflows/cp-phpunit.yml
+++ b/.github/workflows/cp-phpunit.yml
@@ -44,7 +44,7 @@ jobs:
           extensions: mysql
 
       - name: Install Composer dependencies
-        uses: ramsey/composer-install@v3
+        uses: ramsey/composer-install@v4
 
       - name: Setup Test Environment
         run: bash ./bin/install-cp-tests.sh cpc_test root root 127.0.0.1 ${{ matrix.cp-version }}
diff --git a/.github/workflows/phpcs.yml b/.github/workflows/phpcs.yml
index 330d3ef..8d2d3b4 100644
--- a/.github/workflows/phpcs.yml
+++ b/.github/workflows/phpcs.yml
@@ -33,7 +33,7 @@ jobs:
           tools: composer
 
       - name: Install Composer dependencies
-        uses: ramsey/composer-install@v3
+        uses: ramsey/composer-install@v4
 
       - name: Detect coding standard violations
         run: ./vendor/bin/phpcs
diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index fe1d87d..b188501 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -53,7 +53,7 @@ jobs:
           extensions: mysql
 
       - name: Install Composer dependencies
-        uses: ramsey/composer-install@v3
+        uses: ramsey/composer-install@v4
 
       - name: Setup Test Environment
         run: bash ./bin/install-wp-tests.sh wordpress_test root root 127.0.0.1 ${{ matrix.wp-version }}
@@ -89,7 +89,7 @@ jobs:
           extensions: mysql
 
       - name: Install Composer dependencies
-        uses: ramsey/composer-install@v3
+        uses: ramsey/composer-install@v4
 
       - name: Setup Test Environment
         run: bash ./bin/install-wp-tests.sh wordpress_test root root 127.0.0.1 latest