diff --git a/.travis.yml b/.travis.yml
index 47a9067..573b8bb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,7 @@ php:
 
 env:
   global:
-    - CORE_RELEASE=master
+    - CORE_RELEASE=3
   matrix:
     - DB=MYSQL
     - DB=SQLITE