diff --git a/.github/workflows/cp-phpunit.yml b/.github/workflows/cp-phpunit.yml
index 0258f25..08de8fd 100644
--- a/.github/workflows/cp-phpunit.yml
+++ b/.github/workflows/cp-phpunit.yml
@@ -51,7 +51,7 @@ jobs:
           extensions: mysql
 
       - name: Install Composer dependencies for PHP
-        uses: ramsey/composer-install@v3
+        uses: ramsey/composer-install@v4
 
       - name: Setup Test Environment
         run: bash bin/install-cp-tests.sh classicpress_test root root 127.0.0.1 ${{ matrix.cp-version }}
diff --git a/.github/workflows/phpcs.yml b/.github/workflows/phpcs.yml
index 70c6a98..b633559 100644
--- a/.github/workflows/phpcs.yml
+++ b/.github/workflows/phpcs.yml
@@ -31,6 +31,6 @@ jobs:
           coverage: none
           tools: composer, cs2pr
       - name: Install Composer dependencies for PHP
-        uses: ramsey/composer-install@v3
+        uses: ramsey/composer-install@v4
       - name: Detect coding standard violations
         run: ./vendor/bin/phpcs
diff --git a/.github/workflows/wp-phpunit.yml b/.github/workflows/wp-phpunit.yml
index 5a268f9..e67e654 100644
--- a/.github/workflows/wp-phpunit.yml
+++ b/.github/workflows/wp-phpunit.yml
@@ -56,7 +56,7 @@ jobs:
           extensions: mysql
 
       - name: Install Composer dependencies for PHP
-        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 }}