diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index adda188..57628f6 100755
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,12 +13,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout build tools
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: lolibrary/build
           token: ${{ secrets.PAT }}
+          ref: cea7b09494c6541c8bdfc7d919e1d58428061117
       - name: Checkout Sakura
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           path: cache
       - name: GHCR login
diff --git a/.github/workflows/deploy-stage.yml b/.github/workflows/deploy-stage.yml
index e915d35..f1ca0bd 100644
--- a/.github/workflows/deploy-stage.yml
+++ b/.github/workflows/deploy-stage.yml
@@ -5,10 +5,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout build tools
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: lolibrary/build
           token: ${{ secrets.PAT }}
+          ref: cea7b09494c6541c8bdfc7d919e1d58428061117
       - id: 'auth'
         name: 'Authenticate to Google Cloud'
         uses: 'google-github-actions/auth@v1'
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index acfd433..41d7f8b 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -5,10 +5,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout build tools
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: lolibrary/build
           token: ${{ secrets.PAT }}
+          ref: cea7b09494c6541c8bdfc7d919e1d58428061117
       - id: 'auth'
         name: 'Authenticate to Google Cloud'
         uses: 'google-github-actions/auth@v1'