diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8be9308f..76df0c11 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
       matrix:
         node-version: [10.x, 12.x]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         name: Checkout code
       - uses: actions/setup-node@v2
         name: Use Node.js ${{ matrix.node-version }}