diff --git a/.github/workflows/signup.yml b/.github/workflows/signup.yml
index 7f30a980..719336b3 100644
--- a/.github/workflows/signup.yml
+++ b/.github/workflows/signup.yml
@@ -11,7 +11,7 @@ jobs:
         uses: actions/checkout@v1
 
       - name: Comment on the PR with a signup form link
-        uses: thollander/actions-comment-pull-request@master
+        uses: thollander/actions-comment-pull-request@main
         with:
           message: 'Thanks for creating this PR. Please submit your details on [this form](${{ secrets.SIGNUP_FORM }})'
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
\ No newline at end of file