diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 85f400b824..2b5c30fbb4 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       max-parallel: 5
     env: # update this if needed to match a pull request on the RMG-database
-      RMG_PY_BRANCH: main
+      RMG_PY_BRANCH: halogens_kinetics
     defaults:
       run:
         shell: bash -l {0}