diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 4e208ea..c27d787 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -22,7 +22,7 @@ jobs:
     steps:
 
       - name: Checkout files in repo
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/conda-lock-command.yml b/.github/workflows/conda-lock-command.yml
index 1737abb..129b524 100644
--- a/.github/workflows/conda-lock-command.yml
+++ b/.github/workflows/conda-lock-command.yml
@@ -26,7 +26,7 @@ jobs:
 
       # Checkout the pull request branch
       - name: Checkout Repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           token: ${{ steps.app-token.outputs.token }}
           repository: ${{ github.event.client_payload.pull_request.head.repo.full_name }}
diff --git a/.github/workflows/pr_comment.yml b/.github/workflows/pr_comment.yml
index 7319bd8..1f4c3c6 100644
--- a/.github/workflows/pr_comment.yml
+++ b/.github/workflows/pr_comment.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/retag.yml b/.github/workflows/retag.yml
index 0c8833a..ddc1552 100644
--- a/.github/workflows/retag.yml
+++ b/.github/workflows/retag.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout Repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       with:
         persist-credentials: false