diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8c3222f6..abad8de7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
     name: Base steps
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - name: Check Whitespace
       run: git diff --check -- HEAD~1
   ruby-unit-spec:
@@ -22,7 +22,7 @@ jobs:
         ruby: [ruby-3.3, ruby-3.4, ruby-4.0]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
@@ -38,7 +38,7 @@ jobs:
         ruby: [ruby-3.3, ruby-3.4, ruby-4.0]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
@@ -54,7 +54,7 @@ jobs:
         ruby: [ruby-3.3, ruby-3.4, ruby-4.0]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
       with:
         fetch-depth: 0
     - uses: ruby/setup-ruby@v1
@@ -72,7 +72,7 @@ jobs:
         ruby: [ruby-3.3, ruby-3.4, ruby-4.0]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
@@ -88,7 +88,7 @@ jobs:
         ruby: [ruby-3.3, ruby-3.4, ruby-4.0]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
@@ -104,7 +104,7 @@ jobs:
         ruby: [ruby-3.3, ruby-3.4, ruby-4.0]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.2
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
diff --git a/.github/workflows/gem_push.yml b/.github/workflows/gem_push.yml
index 57152aad..78903489 100644
--- a/.github/workflows/gem_push.yml
+++ b/.github/workflows/gem_push.yml
@@ -19,7 +19,7 @@ jobs:
       contents: write
       id-token: write
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ruby