diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index c858e8b..6972db8 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -10,6 +10,8 @@ updates:
     labels:
       - dependencies
       - github-actions
+    cooldown:
+      default-days: 7
 
   - package-ecosystem: "npm"
     directory: "/site"
@@ -45,4 +47,4 @@ updates:
           - "patch"
     labels:
       - dependencies
-      - scripts
+      - scripts
\ No newline at end of file
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index c1905bf..6ee98c5 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -22,10 +22,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - name: Setup Node.js
-        uses: actions/setup-node@v7
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: 22
           cache: npm
@@ -42,7 +42,7 @@ jobs:
         run: npm ci
 
       - name: Azure login (OIDC)
-        uses: azure/login@v3
+        uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
         with:
           client-id: ${{ secrets.AZURE_CLIENT_ID }}
           tenant-id: ${{ secrets.AZURE_TENANT_ID }}
@@ -78,7 +78,7 @@ jobs:
         run: touch ./site/dist/.nojekyll
 
       - name: Deploy to GitHub Pages
-        uses: JamesIves/github-pages-deploy-action@v4
+        uses: JamesIves/github-pages-deploy-action@fa24774553152dd7873cd16ebd8d959b010c5445 # v4.9.0
         with:
           branch: gh-pages
           folder: ./site/dist
diff --git a/.github/workflows/preview-cleanup.yml b/.github/workflows/preview-cleanup.yml
index e110e61..8374c30 100644
--- a/.github/workflows/preview-cleanup.yml
+++ b/.github/workflows/preview-cleanup.yml
@@ -23,7 +23,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout gh-pages branch
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           ref: gh-pages
 
diff --git a/.github/workflows/preview-deploy.yml b/.github/workflows/preview-deploy.yml
index 1f7bb4e..d2ed9ca 100644
--- a/.github/workflows/preview-deploy.yml
+++ b/.github/workflows/preview-deploy.yml
@@ -37,7 +37,7 @@ jobs:
       actions: read
     steps:
       - name: Download PR metadata artifact
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           name: pr-metadata
           path: ./pr-meta
@@ -45,7 +45,7 @@ jobs:
           github-token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Download built site artifact
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           name: preview-dist
           path: ./site-dist
@@ -62,7 +62,7 @@ jobs:
 
       - name: Get PR author
         id: pr
-        uses: actions/github-script@v9
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         env:
           PR_NUMBER: ${{ steps.metadata.outputs.pr_number }}
         with:
@@ -78,7 +78,7 @@ jobs:
       # Requires the FORGEBOOK_TEAM_READ_TOKEN repo secret — see comment at top of file.
       - name: Check forgebook-contributors team membership
         id: membership
-        uses: actions/github-script@v9
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         env:
           PR_AUTHOR: ${{ steps.pr.outputs.author }}
         with:
@@ -103,7 +103,7 @@ jobs:
 
       - name: Deploy preview to GitHub Pages subdirectory
         if: steps.membership.outputs.is_member == 'true'
-        uses: JamesIves/github-pages-deploy-action@v4
+        uses: JamesIves/github-pages-deploy-action@fa24774553152dd7873cd16ebd8d959b010c5445 # v4.9.0
         with:
           branch: gh-pages
           folder: ./site-dist
@@ -112,7 +112,7 @@ jobs:
 
       - name: Comment PR with preview URL
         if: steps.membership.outputs.is_member == 'true'
-        uses: actions/github-script@v9
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         env:
           PR_NUMBER: ${{ steps.metadata.outputs.pr_number }}
         with:
@@ -145,7 +145,7 @@ jobs:
 
       - name: Comment PR that a maintainer needs to review before preview deploys
         if: steps.membership.outputs.is_member == 'false'
-        uses: actions/github-script@v9
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         env:
           PR_NUMBER: ${{ steps.metadata.outputs.pr_number }}
           PR_AUTHOR: ${{ steps.pr.outputs.author }}
diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index d928596..c77fe2e 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -24,10 +24,10 @@ jobs:
       contents: read
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - name: Setup Node.js
-        uses: actions/setup-node@v7
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: 22
           cache: npm
@@ -77,14 +77,14 @@ jobs:
           EOF
 
       - name: Upload PR metadata
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: pr-metadata
           path: ./pr-meta/metadata.json
           retention-days: 1
 
       - name: Upload built site
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: preview-dist
           path: ./site/dist
diff --git a/.github/workflows/validate-popular-fetch.yml b/.github/workflows/validate-popular-fetch.yml
index ac9c6f6..ed862f5 100644
--- a/.github/workflows/validate-popular-fetch.yml
+++ b/.github/workflows/validate-popular-fetch.yml
@@ -17,10 +17,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - name: Setup Node.js
-        uses: actions/setup-node@v7
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: 22
           cache: npm
@@ -31,7 +31,7 @@ jobs:
         run: npm ci
 
       - name: Azure login (OIDC)
-        uses: azure/login@v3
+        uses: azure/login@a641126d1b8aa4d1fa005f4f92df94a3a4c4c906 # v3.1.0
         with:
           client-id: ${{ secrets.AZURE_CLIENT_ID }}
           tenant-id: ${{ secrets.AZURE_TENANT_ID }}