.travis.yml in fluent-plugin-cloudwatch-1.2.12 vs .travis.yml in fluent-plugin-cloudwatch-1.2.13

@@ -1,16 +1,21 @@
 language: ruby
 
+before_install:
+  - gem update bundler
+
 rvm:
-  - 1.9.3
   - 2.0.0
-  - 2.1
-  - 2.2
+  - 2.1.8
+  - 2.2.4
+  - 2.3.0
 
 gemfile:
   - Gemfile
   - Gemfile.fluentd.0.10
 
 matrix:
   exclude:
-    - rvm: 2.2
+    - rvm: 2.2.4
+      gemfile: Gemfile.fluentd.0.10
+    - rvm: 2.3.0
       gemfile: Gemfile.fluentd.0.10