diff --git a/.circleci/config.yml b/.circleci/config.yml
index 8f8462aed58ac344efc952cbd3a798aba17e1f0b..4e82a0d88ee1ed884742ab40733bacd41c2ec10a 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -206,5 +206,6 @@ workflows:
             - build
           filters:
             branches:
+              only: /^(?!pull\/).*$/ # don't deploy to gh pages on PRs.
               ignore:
                 - ^dependabot/.*/