.travis.yml in fluent-plugin-config-expander-0.2.1 vs .travis.yml in fluent-plugin-config-expander-1.0.0

@@ -1,9 +1,9 @@
 language: ruby
 sudo: false
 rvm:
-  - 2.0.0
   - 2.1
   - 2.2
-  - 2.3.0
+  - 2.3.3
+  - 2.4.0
 before_install:
   - gem update bundler
\ No newline at end of file