diff --git a/.github/workflows/auto-assignment.yml b/.github/workflows/auto-assignment.yml
index 661dc20ec..7a77bb614 100644
--- a/.github/workflows/auto-assignment.yml
+++ b/.github/workflows/auto-assignment.yml
@@ -17,10 +17,10 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
 
       - name: Run auto-assignment script
-        uses: actions/github-script@v7
+        uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b # v7
         with:
           script: |
             const path = require('path');
diff --git a/.github/workflows/cross-language-integration.yml b/.github/workflows/cross-language-integration.yml
index 9ba2a2d7b..b244b729d 100644
--- a/.github/workflows/cross-language-integration.yml
+++ b/.github/workflows/cross-language-integration.yml
@@ -12,13 +12,13 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
 
       - name: Use Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6
 
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5
         with:
           go-version: '1.25'
 
diff --git a/.github/workflows/csat.yml b/.github/workflows/csat.yml
index 16cc1485b..761ec7056 100644
--- a/.github/workflows/csat.yml
+++ b/.github/workflows/csat.yml
@@ -14,8 +14,8 @@ jobs:
   welcome:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/github-script@v6
+      - uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
+      - uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b # v7
         with:
           script: |
             const script = require('./.github/scripts/csat.cjs')
diff --git a/.github/workflows/license-check.yml b/.github/workflows/license-check.yml
index 743de0138..2fcc8699c 100644
--- a/.github/workflows/license-check.yml
+++ b/.github/workflows/license-check.yml
@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
 
       - name: Run license check
         run: bash scripts/check_license.sh
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
index dde08b3a7..1b29a1093 100644
--- a/.github/workflows/release-please.yml
+++ b/.github/workflows/release-please.yml
@@ -14,7 +14,7 @@ jobs:
   release-please:
     runs-on: ubuntu-latest
     steps:
-      - uses: googleapis/release-please-action@v4
+      - uses: googleapis/release-please-action@5c625bfb5d1ff62eadeeb3772007f7f66fdcf071 # v4
         id: release
         with:
           token: ${{ secrets.MY_RELEASE_PLEASE_TOKEN }}
diff --git a/.github/workflows/validation.yaml b/.github/workflows/validation.yaml
index 7bb00098e..f591bb1ee 100644
--- a/.github/workflows/validation.yaml
+++ b/.github/workflows/validation.yaml
@@ -18,13 +18,13 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
 
       - name: Use Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6
 
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
         with:
           python-version: '3.11'