diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cefce05..a51a5cd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.0
       -
         name: Gen dummy page
         run: |
diff --git a/.github/workflows/labels.yml b/.github/workflows/labels.yml
index d4963ae..a2b601d 100644
--- a/.github/workflows/labels.yml
+++ b/.github/workflows/labels.yml
@@ -14,7 +14,7 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.0
       -
         name: Run Labeler
         if: success()
diff --git a/.github/workflows/pre-checkin.yml b/.github/workflows/pre-checkin.yml
index 38808c1..b306623 100644
--- a/.github/workflows/pre-checkin.yml
+++ b/.github/workflows/pre-checkin.yml
@@ -14,7 +14,7 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.0
       -
         name: Install
         run: yarn install