diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c9e2da22d..0b2919a8f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,7 +37,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           clean: 'false'
           fetch-depth: '0'
diff --git a/.github/workflows/close-milestone.yml b/.github/workflows/close-milestone.yml
index 5e00c096f..3365f16cf 100644
--- a/.github/workflows/close-milestone.yml
+++ b/.github/workflows/close-milestone.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/dependabot-merge.yml b/.github/workflows/dependabot-merge.yml
index 49e9b2efd..f4d19705d 100644
--- a/.github/workflows/dependabot-merge.yml
+++ b/.github/workflows/dependabot-merge.yml
@@ -25,7 +25,7 @@ jobs:
         env:
           RUNNER_CONTEXT: ${{ toJson(runner) }}
         run: echo "$RUNNER_CONTEXT"
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
         with:
           ref: master
       - name: Dependabot Commenter
diff --git a/.github/workflows/draft-release.yml b/.github/workflows/draft-release.yml
index ff25987c9..022abb64c 100644
--- a/.github/workflows/draft-release.yml
+++ b/.github/workflows/draft-release.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/sync-labels.yml b/.github/workflows/sync-labels.yml
index 6c1f1ca52..c6ec4b475 100644
--- a/.github/workflows/sync-labels.yml
+++ b/.github/workflows/sync-labels.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Run Labeler
         if: success()
diff --git a/.github/workflows/update-milestone.yml b/.github/workflows/update-milestone.yml
index 82fa74756..120c6e1c8 100644
--- a/.github/workflows/update-milestone.yml
+++ b/.github/workflows/update-milestone.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: sync milestones
         uses: RocketSurgeonsGuild/actions/sync-milestone@v0.2.4