diff --git a/.github/workflows/openwiki-update.yml b/.github/workflows/openwiki-update.yml
index 2d96354..e08b466 100644
--- a/.github/workflows/openwiki-update.yml
+++ b/.github/workflows/openwiki-update.yml
@@ -14,16 +14,21 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v4
+        with:
+          # Full history so `openwiki code --update` can diff HEAD against the
+          # commit it last documented; a shallow clone hides that commit and the
+          # update runs against an empty change summary.
+          fetch-depth: 0
 
       - name: Set up Node.js
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: "22"
 
       - name: Install OpenWiki
         # mermaid + jsdom are optional; they add high-fidelity validation of Mermaid diagrams. Remove if your wiki has none.
-        run: npm install --global openwiki@0.2.3 mermaid@11.16.0 jsdom@29.1.1
+        run: npm install --global openwiki mermaid@11.16.0 jsdom@29.1.1
 
       - name: Run OpenWiki
         run: openwiki code --update --print
@@ -32,8 +37,19 @@ jobs:
           GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
           OPENWIKI_MODEL_ID: gemini-3.6-flash
 
+
+      - name: Restore protected workflow file
+        # `openwiki code --update` regenerates this file from its internal
+        # template on every run, which silently drops the guard above (see
+        # https://github.com/langchain-ai/openwiki/issues/423). Until that's
+        # fixed upstream, discard whatever the agent just wrote here so the
+        # guard always survives, regardless of whether the run above
+        # succeeded or failed.
+        if: always()
+        run: git checkout -- .github/workflows/openwiki-update.yml
+
       - name: Create OpenWiki update pull request
-        uses: peter-evans/create-pull-request@22a9089034f40e5a961c8808d113e2c98fb63676 # v7
+        uses: peter-evans/create-pull-request@5f6978faf089d4d20b00c7766989d076bb2fc7f1 # v8.1.1
         with:
           add-paths: |
             openwiki
@@ -46,4 +62,4 @@ jobs:
           body: |
             Automated OpenWiki documentation update.
 
-            This PR was generated by the scheduled OpenWiki workflow.
+            This PR was generated by the scheduled OpenWiki workflow.
\ No newline at end of file