diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b8906ada..263d95cc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,7 @@ jobs:
         STACK: "${{ matrix.stack }}"
     steps:
       - name: 🛎  Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
       - name: 🔎 Run tests
         run: |