diff --git a/.travis.yml b/.travis.yml
index f45613aa..2d78e2ba 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ addons:
 
 env:
   global:
-    - CORE_RELEASE=3
+    - CORE_RELEASE=3.5
 
 matrix:
   include: