diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cbefb31..924e3ef 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
             label: tests (PHPUnit + smoke tests)
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/docs-agent.yml b/.github/workflows/docs-agent.yml
index 2f7e100..618748b 100644
--- a/.github/workflows/docs-agent.yml
+++ b/.github/workflows/docs-agent.yml
@@ -173,12 +173,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Agents API
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 0
 
       - name: Checkout Docs Agent
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
         with:
           repository: Automattic/docs-agent
           ref: ${{ inputs.docs_agent_ref }}