update travis jdk
diff --git a/.travis.yml b/.travis.yml
index 7e5fec9..f1532d2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,14 +1,13 @@
 language: go
 
-go:
-  - "1.11"
-  - "1.12"
-
 matrix:
   include:
     - language: java
       jdk: openjdk8
 
+go:
+  - "1.12"
+
 script:
   - mvn clean package -f test_hessian/pom.xml
   - mvn clean package -f test_dubbo/pom.xml