update travis build settings
diff --git a/.travis.yml b/.travis.yml
index 264c227..d9b2ad4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,9 @@
 language: java
+# core streaming still builds on jdk6 and above:
 jdk:
   - openjdk6
+  - oraclejdk7
+  - oraclejdk8
 
 # Below this line is configuration for deploying to the Sonatype OSS repo
 # http://blog.xeiam.com/2013/05/configure-travis-ci-to-deploy-snapshots.html
@@ -11,9 +14,8 @@
 branches:
   only:
     - master
-    - "2.3"
-    - "2.4"
     - "2.5"
+    - "2.6"
 
 env:
   global: