diff --git a/.drone.yml b/.drone.yml
index 78dab25..fb2a742 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -6,7 +6,7 @@ steps:
     image: nextcloudci/php7.3:php7.3-5
     environment:
       APP_NAME: workflow_script
-      CORE_BRANCH: master
+      CORE_BRANCH: stable20
       DB: sqlite
     commands:
       # Pre-setup steps