diff --git a/.github/workflows/update-submodules.yml b/.github/workflows/update-submodules.yml
index 38d8aa70c..0c2ab0325 100644
--- a/.github/workflows/update-submodules.yml
+++ b/.github/workflows/update-submodules.yml
@@ -12,6 +12,7 @@ on:
 
 jobs:
   run:
+    if: ${{ github.event_name == 'workflow_dispatch' || github.repository_owner == 'DFHack' }}
     runs-on: ubuntu-latest
     steps:
     - name: Clone DFHack