diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6a6a1f4..166dd6c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,7 +1,9 @@
 name: Athena
 
 on:
-  pull_request: # TODO: Set this back to only master
+  pull_request:
+    branches:
+      - 'master'
   schedule:
     - cron: '37 0 * * *' # Nightly at 00:37