.travis.yml in danger-pmd-0.0.5 vs .travis.yml in danger-pmd-0.1.0

@@ -2,9 +2,9 @@
 cache:
   directories:
     - bundle
 
 rvm:
-  - 2.3.1
+  - 2.3.8
 
 script:
-    - bundle exec rake spec
\ No newline at end of file
+    - bundle exec rake spec