diff --git a/.github/workflows/validate-frontmatter.yml b/.github/workflows/validate-frontmatter.yml
index bb4a58d..3fd2224 100644
--- a/.github/workflows/validate-frontmatter.yml
+++ b/.github/workflows/validate-frontmatter.yml
@@ -31,8 +31,8 @@ jobs:
     name: Frontmatter SEO check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
         with:
           node-version: "20"
       - name: Run frontmatter validator