diff --git a/.drone.yml b/.drone.yml
index d3881a5..b291d34 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -8,7 +8,7 @@ pipeline:
     image: nextcloudci/php7.0:php7.0-2
     environment:
       - APP_NAME=files_trackdownloads
-      - CORE_BRANCH=master
+      - CORE_BRANCH=stable15
       - DB=sqlite
     commands:
       - wget https://raw.githubusercontent.com/nextcloud/travis_ci/master/before_install.sh
diff --git a/.travis.yml b/.travis.yml
index 5d8539c..972825c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,7 @@ php:
 
 env:
   global:
-    - CORE_BRANCH=master
+    - CORE_BRANCH=stable15
     - APP_NAME=files_trackdownloads
   matrix:
     - DB=sqlite