diff --git a/.circleci/config.yml b/.circleci/config.yml
index 82754209..5bada863 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -335,6 +335,11 @@ jobs:
     steps:
       - attach_workspace:
           at: .
+      - run:
+          name: Add GitHub to known hosts
+          command: |
+            mkdir -p ~/.ssh
+            echo 'github.com ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAq2A7hRGmdnm9tUDbO9IDSwBK6TbQa+PXYPCPy6rbTrTtw7PHkccKrpp0yVhp5HdEIcKr6pLlVDBfOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ==' >> ~/.ssh/known_hosts
       - run:
           name: Deploy to GitHub pages
           # Version pinned to 3.0.0 because of https://github.com/tschaub/gh-pages/issues/354