diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index a68e5a18..6882c7c3 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -1,5 +1,5 @@
 name: Publish docs via GitHub Pages
-on: [push, workflow_dispatch]
+on: [pull_request, push, workflow_dispatch]
 
 jobs:
   build:
@@ -16,6 +16,7 @@ jobs:
           tools/populate-docs.sh
 
       - name: Deploy docs
+        if: github.ref == 'refs/heads/master'
         uses: mhausenblas/mkdocs-deploy-gh-pages@master
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
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