diff --git a/.github/workflows/build-test-containers.yml b/.github/workflows/build-test-containers.yml
index b0319d29..8e941997 100644
--- a/.github/workflows/build-test-containers.yml
+++ b/.github/workflows/build-test-containers.yml
@@ -7,7 +7,7 @@ jobs:
   base:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: docker/login-action@v4
       with:
         registry: ghcr.io
@@ -44,7 +44,7 @@ jobs:
         - '4.0'
       fail-fast: false
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: docker/login-action@v4
       with:
         registry: ghcr.io
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 08601218..47adefd2 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -21,7 +21,7 @@ jobs:
         - jruby-10.1
       fail-fast: false
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: "${{ matrix.ruby }}"
@@ -40,7 +40,7 @@ jobs:
         # - alpine
       fail-fast: false
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - run: |
         if command -v apt-get &> /dev/null; then
           apt-get update
@@ -70,7 +70,7 @@ jobs:
         - '4.0'
       fail-fast: false
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: "${{ matrix.ruby }}"
@@ -93,7 +93,7 @@ jobs:
   update_worker_options_in_readme:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: '4'
diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index 94e5ab22..9e134786 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -8,7 +8,7 @@ jobs:
   rubocop:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: '4'