diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 08facd8..dbeb99f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           submodules: 'true'
 
@@ -16,7 +16,7 @@ jobs:
         run: npm ci
 
       - name: Install Node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
 
       - name: Run Linter
         run: npm run lint