diff --git a/.travis.yml b/.travis.yml
index b2667720..56d95452 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ services:
 
 env:
   global:
-    - CORE_BRANCH=master
+    - CORE_BRANCH=stable15
     - APP_NAME=nextcloud_announcements
 #  matrix:
 #    - DB=sqlite