diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index a6e70e4..e1c85a5 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -21,6 +21,8 @@ updates:
 
 
   # Git submodules (e.g. submodules/ai-landing-zone)
+    cooldown:
+      default-days: 7
   - package-ecosystem: "gitsubmodule"
     directory: "/"
     schedule:
diff --git a/.github/workflows/azd-template-validation.yml b/.github/workflows/azd-template-validation.yml
index 82f1a55..10e09da 100644
--- a/.github/workflows/azd-template-validation.yml
+++ b/.github/workflows/azd-template-validation.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     name: azd template validation
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           submodules: recursive
 
diff --git a/.github/workflows/azure-dev.yml b/.github/workflows/azure-dev.yml
index 5d8f638..34cf0e5 100644
--- a/.github/workflows/azure-dev.yml
+++ b/.github/workflows/azure-dev.yml
@@ -28,7 +28,7 @@ jobs:
       TEMP: /tmp
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           submodules: recursive
 
@@ -40,7 +40,7 @@ jobs:
           echo "Using unique AZURE_ENV_NAME: ${AZURE_ENV_NAME}-${SUFFIX}"
 
       - name: Install azd
-        uses: Azure/setup-azd@v2
+        uses: Azure/setup-azd@0b7e3a35ab00f2eee7080c845eb39c3f0ebfa553 # v2.4.0
 
       - name: Azure Developer CLI Login
         run: |
@@ -51,7 +51,7 @@ jobs:
         shell: pwsh
 
       - name: Azure CLI Login
-        uses: azure/login@v2
+        uses: azure/login@7184910d9eb2b1c5e48f7073824a90609bb9b6d6 # v2.3.1
         with:
           client-id: ${{ vars.AZURE_CLIENT_ID }}
           tenant-id: ${{ vars.AZURE_TENANT_ID }}
diff --git a/.github/workflows/broken-links-checker.yml b/.github/workflows/broken-links-checker.yml
index 9901fa1..84b2868 100644
--- a/.github/workflows/broken-links-checker.yml
+++ b/.github/workflows/broken-links-checker.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout Repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           fetch-depth: 0
 
@@ -24,7 +24,7 @@ jobs:
       - name: Get changed markdown files (PR only)
         id: changed-markdown-files
         if: github.event_name == 'pull_request'
-        uses: tj-actions/changed-files@ed68ef82c095e0d48ec87eccea555d944a631a4c # v46
+        uses: tj-actions/changed-files@ed68ef82c095e0d48ec87eccea555d944a631a4c # v46.0.5
         with:
           files: |
             **/*.md
@@ -34,7 +34,7 @@ jobs:
       - name: Check Broken Links in Changed Markdown Files
         id: lychee-check-pr
         if: github.event_name == 'pull_request' && steps.changed-markdown-files.outputs.any_changed == 'true'
-        uses: lycheeverse/lychee-action@v2.4.1
+        uses: lycheeverse/lychee-action@82202e5e9c2f4ef1a55a3d02563e1cb6041e5332 # v2.4.1
         with:
           args: >
             --verbose --exclude-mail --no-progress --exclude ^https?://
@@ -47,7 +47,7 @@ jobs:
       - name: Check Broken Links in All Markdown Files in Entire Repo (Manual Trigger)
         id: lychee-check-manual
         if: github.event_name == 'workflow_dispatch'
-        uses: lycheeverse/lychee-action@v2.4.1
+        uses: lycheeverse/lychee-action@82202e5e9c2f4ef1a55a3d02563e1cb6041e5332 # v2.4.1
         with:
           args: >
             --verbose --exclude-mail --no-progress --exclude ^https?://
diff --git a/.github/workflows/pr-title-checker.yml b/.github/workflows/pr-title-checker.yml
index b7e70e5..bf27444 100644
--- a/.github/workflows/pr-title-checker.yml
+++ b/.github/workflows/pr-title-checker.yml
@@ -17,6 +17,6 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.event_name != 'merge_group' }}
     steps:
-      - uses: amannn/action-semantic-pull-request@v5
+      - uses: amannn/action-semantic-pull-request@e32d7e603df1aa1ba07e981f2a23455dee596825 # v5
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/stale-bot.yml b/.github/workflows/stale-bot.yml
index abcd68d..2de18b5 100644
--- a/.github/workflows/stale-bot.yml
+++ b/.github/workflows/stale-bot.yml
@@ -12,7 +12,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@5bef64f19d7facfb25b37b414482c7164d639639 # v9.1.0
         with:
           stale-issue-message: "This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 30 days."
           days-before-stale: 180