diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index b9ab025..61a8a65 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           ref: ${{ github.event.release.tag_name }}
       - name: Install deps and build
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index da9ce27..a27c825 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
         version: [2.11.27]
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Install deps and build
         run: npm ci && npm run build
diff --git a/workflows/test.yml b/workflows/test.yml
index 8f320a8..44b215e 100644
--- a/workflows/test.yml
+++ b/workflows/test.yml
@@ -20,7 +20,7 @@ jobs:
         version: [0.1.14]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Setup kosli CLI
         uses: ./