diff --git a/.github/workflows/update_available_software.yml b/.github/workflows/update_available_software.yml
index 4264cb0e00..633769f29b 100644
--- a/.github/workflows/update_available_software.yml
+++ b/.github/workflows/update_available_software.yml
@@ -6,6 +6,7 @@ on:
     - cron: '0 */4 * * *'
 jobs:
   update_available_software:
+    if: github.repository_owner == 'EESSI'   # Prevent running on forks
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6