diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 113e99e..27c90e5 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -13,33 +13,33 @@ jobs:
   setup:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
       - uses: ./.github/actions/install
   typesync:
     needs: setup
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
       - uses: ./.github/actions/install
       - run: pnpm typesync:ci
   typecheck:
     needs: setup
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
       - uses: ./.github/actions/install
       - run: pnpm typecheck
   lint:
     needs: setup
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
       - uses: ./.github/actions/install
       - run: pnpm lint:ci
   test:
     needs: setup
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
       - uses: ./.github/actions/install
       - run: pnpm test