diff --git a/.github/workflows/glossary.yml b/.github/workflows/glossary.yml
index 1a25fd90799..f14cc68257c 100644
--- a/.github/workflows/glossary.yml
+++ b/.github/workflows/glossary.yml
@@ -3,6 +3,7 @@ name: Update glossary
 # Controls when the workflow will run
 on:
   gollum:
+    branches: [main]
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
     inputs: