diff --git a/.travis.yml b/.travis.yml
index 59c937e..7af01f7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,9 +9,11 @@ matrix:
   include:
   - rvm: jruby-9.1.10.0
     env: LOGSTASH_BRANCH=master
+  - rvm: jruby-9.1.10.0
+    env: LOGSTASH_BRANCH=6.x
   - rvm: jruby-1.7.25
-    env: LOGSTASH_BRANCH=5.x
+    env: LOGSTASH_BRANCH=5.6
   fast_finish: true
 install: true
 script: ci/build.sh
-jdk: oraclejdk8
+jdk: oraclejdk8
\ No newline at end of file