diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 000000000..592e80500
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,8 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    cooldown:
+      default-days: 5
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index c9232c711..a54d3b6f4 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -24,18 +24,18 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v2
+        uses: github/codeql-action/init@1c5b675653bb5c22dbe9b12b556ec555138e09fd # v4.38.1
         with:
           languages: ${{ matrix.language }}
           queries: +security-and-quality
 
       - name: Autobuild
-        uses: github/codeql-action/autobuild@v2
+        uses: github/codeql-action/autobuild@1c5b675653bb5c22dbe9b12b556ec555138e09fd # v4.38.1
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v2
+        uses: github/codeql-action/analyze@1c5b675653bb5c22dbe9b12b556ec555138e09fd # v4.38.1
         with:
           category: "/language:${{ matrix.language }}"
diff --git a/.github/workflows/codex-review.yml b/.github/workflows/codex-review.yml
index ee0cdc81b..3c06690b4 100644
--- a/.github/workflows/codex-review.yml
+++ b/.github/workflows/codex-review.yml
@@ -40,7 +40,7 @@ jobs:
 
       - name: Run Codex review
         id: run_codex
-        uses: openai/codex-action@v1
+        uses: openai/codex-action@86365089eb2b84e0a8fb0717b304f8bdcb13b20e # v1.12
         env:
           # Use env variables to handle untrusted metadata safely
           PR_TITLE: ${{ github.event.pull_request.title }}
@@ -75,7 +75,7 @@ jobs:
 
     steps:
       - name: Post Codex review as PR comment
-        uses: actions/github-script@v8
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         env:
           CODEX_FINAL_MESSAGE: |
             ${{ format('## Codex Review