diff --git a/.github/workflows/backward-compatibility-check.yml b/.github/workflows/backward-compatibility-check.yml
index fb2216d..f413493 100644
--- a/.github/workflows/backward-compatibility-check.yml
+++ b/.github/workflows/backward-compatibility-check.yml
@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: actions/checkout@v4
+        uses: actions/checkout@v4.1.1
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/coding-standard.yml b/.github/workflows/coding-standard.yml
index 810c0ae..9c63dde 100644
--- a/.github/workflows/coding-standard.yml
+++ b/.github/workflows/coding-standard.yml
@@ -29,7 +29,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v4
+              uses: actions/checkout@v4.1.1
 
             - name: "Install PHP"
               uses: "shivammathur/setup-php@2.24.0"
diff --git a/.github/workflows/mutation-tests.yml b/.github/workflows/mutation-tests.yml
index 0121f1e..426e3f3 100644
--- a/.github/workflows/mutation-tests.yml
+++ b/.github/workflows/mutation-tests.yml
@@ -29,7 +29,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v4
+              uses: actions/checkout@v4.1.1
 
             - name: "Install PHP"
               uses: "shivammathur/setup-php@2.24.0"
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 685e5f1..72de519 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -29,7 +29,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v4
+              uses: actions/checkout@v4.1.1
 
             - name: "Install PHP"
               uses: "shivammathur/setup-php@2.24.0"
diff --git a/.github/workflows/psalm.yml b/.github/workflows/psalm.yml
index c7597f6..883697d 100644
--- a/.github/workflows/psalm.yml
+++ b/.github/workflows/psalm.yml
@@ -29,7 +29,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v4
+              uses: actions/checkout@v4.1.1
 
             - name: "Install PHP"
               uses: "shivammathur/setup-php@2.24.0"
diff --git a/.github/workflows/release-on-milestone-closed-triggering-release-event.yml b/.github/workflows/release-on-milestone-closed-triggering-release-event.yml
index 0f045dd..2ed5e37 100644
--- a/.github/workflows/release-on-milestone-closed-triggering-release-event.yml
+++ b/.github/workflows/release-on-milestone-closed-triggering-release-event.yml
@@ -18,7 +18,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v4
+              uses: actions/checkout@v4.1.1
 
             - name: "Release"
               uses: "laminas/automatic-releases@v1"
diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index 6c017b6..6c2e3a3 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -38,7 +38,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v4
+              uses: actions/checkout@v4.1.1
 
             - name: "Install PHP"
               uses: "shivammathur/setup-php@2.24.0"