diff --git a/.travis.yml b/.travis.yml
index 1d29ab7f..383c89dc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,11 @@ sudo:
     false
 
 jdk:
-  - oraclejdk8
-  - oraclejdk7
-  - openjdk7
+    - oraclejdk8
+    - oraclejdk9
+    - openjdk7
+
+matrix:
+    allow_failures:
+        - jdk: oraclejdk9