diff --git a/.github/workflows/lockfile_registry_guard.yml b/.github/workflows/lockfile_registry_guard.yml
index 6332715d..0b865809 100644
--- a/.github/workflows/lockfile_registry_guard.yml
+++ b/.github/workflows/lockfile_registry_guard.yml
@@ -27,7 +27,7 @@ jobs:
       contents: read
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v7.0.1
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
       - name: Reject internal npm mirror URLs
diff --git a/.github/workflows/sync_space.yml b/.github/workflows/sync_space.yml
index aab082a6..fd595f3c 100644
--- a/.github/workflows/sync_space.yml
+++ b/.github/workflows/sync_space.yml
@@ -14,7 +14,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v7.0.1
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           lfs: true
           persist-credentials: false