diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 97ae77e..14d9f63 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,7 +37,7 @@ 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 }}"
 
diff --git a/.github/workflows/coding-standards.yml b/.github/workflows/coding-standards.yml
index e00e374..ab30f03 100644
--- a/.github/workflows/coding-standards.yml
+++ b/.github/workflows/coding-standards.yml
@@ -28,7 +28,7 @@ jobs:
           tools: "cs2pr"
 
       - name: "Install dependencies with Composer"
-        uses: "ramsey/composer-install@v2"
+        uses: "ramsey/composer-install@4.0.0"
 
       - name: "Run PHP_CodeSniffer"
         run: "vendor/bin/phpcs -q --no-colors --report=checkstyle | cs2pr"
diff --git a/.github/workflows/infection.yaml b/.github/workflows/infection.yaml
index c8873a9..a92ac69 100644
--- a/.github/workflows/infection.yaml
+++ b/.github/workflows/infection.yaml
@@ -23,7 +23,7 @@ jobs:
           coverage: "pcov"
 
       - name: "Install dependencies with Composer"
-        uses: "ramsey/composer-install@v2"
+        uses: "ramsey/composer-install@4.0.0"
 
       - name: Run Infection
         run: vendor/bin/infection --threads=$(nproc)
diff --git a/.github/workflows/static-analysis.yml b/.github/workflows/static-analysis.yml
index 9ef70bc..e579712 100644
--- a/.github/workflows/static-analysis.yml
+++ b/.github/workflows/static-analysis.yml
@@ -28,7 +28,7 @@ jobs:
           tools: "cs2pr"
 
       - name: "Install dependencies with Composer"
-        uses: "ramsey/composer-install@v2"
+        uses: "ramsey/composer-install@4.0.0"
 
       - name: "Run a static analysis with phpstan/phpstan"
         run: "vendor/bin/phpstan analyse --error-format=checkstyle | cs2pr"