diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 7f18d3b..4826788 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -47,7 +47,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: "22"
+          node-version: "22" # Pin to minimum supported version for publishing
           registry-url: "https://registry.npmjs.org"
 
       - name: Clean install
diff --git a/renovate.json b/renovate.json
index c8b0e40..4a4452f 100644
--- a/renovate.json
+++ b/renovate.json
@@ -26,6 +26,13 @@
       "description": "Group GitHub Actions updates",
       "matchManagers": ["github-actions"],
       "groupName": "github actions"
+    },
+    {
+      "description": "Pin publish workflow to minimum supported Node version",
+      "matchManagers": ["github-actions"],
+      "matchPackageNames": ["node"],
+      "matchFileNames": [".github/workflows/publish.yml"],
+      "enabled": false
     }
   ]
 }