diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index fe9cd75554..61e06c66b8 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -32,7 +32,7 @@ jobs:
           sed -i "/segment_analytics/s/^#//" source/conf.py
           make html
       - name: Deploy to Pages
-        uses: JamesIves/github-pages-deploy-action@master
+        uses: JamesIves/github-pages-deploy-action@9fa3b18fe9b1acc7b4d6abccb59b2e50afd9e305
         env:
           ACCESS_TOKEN: ${{ secrets.GITHUB_WRITE_TOKEN }}
           BASE_BRANCH: master # The branch the action should deploy from.