diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ae510aa..cfa8ea0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,7 +42,7 @@ jobs:
           MYSQL_DATABASE: wordpress_test
     steps:
       - name: Check out source code
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
       - name: Decide whether to enable coverage
         id: coverage
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
index 2961689..c41e0ea 100644
--- a/.github/workflows/dependency-review.yml
+++ b/.github/workflows/dependency-review.yml
@@ -20,7 +20,7 @@ jobs:
             github.com:443
 
       - name: Check out the source code
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
       - name: Review dependencies
         uses: actions/dependency-review-action@6c5ccdad469c9f8a2996bfecaec55a631a347034 # v3.1.0
diff --git a/.github/workflows/phpcs.yml b/.github/workflows/phpcs.yml
index c6160a6..58793c7 100644
--- a/.github/workflows/phpcs.yml
+++ b/.github/workflows/phpcs.yml
@@ -18,7 +18,7 @@ jobs:
     if: "!contains(github.event.head_commit.message, '[ci skip]')"
     steps:
       - name: Check out source code
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
       - name: Set up PHP
         uses: shivammathur/setup-php@7fdd3ece872ec7ec4c098ae5ab7637d5e0a96067 # 2.26.0
diff --git a/.github/workflows/static-code-analysis.yml b/.github/workflows/static-code-analysis.yml
index 1b7077e..5b06c24 100644
--- a/.github/workflows/static-code-analysis.yml
+++ b/.github/workflows/static-code-analysis.yml
@@ -21,7 +21,7 @@ jobs:
     if: "!contains(github.event.head_commit.message, '[ci skip]')"
     steps:
       - name: Check out source code
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
       - name: Set up PHP
         uses: shivammathur/setup-php@7fdd3ece872ec7ec4c098ae5ab7637d5e0a96067 # 2.26.0