.travis.yml in ndr_support-5.3.0 vs .travis.yml in ndr_support-5.3.1

@@ -3,12 +3,13 @@
 rvm:
   - 2.2.5
   - 2.3.1
 
 gemfile:
-  - gemfiles/Gemfile.rails32
   - gemfiles/Gemfile.rails41
   - gemfiles/Gemfile.rails42
+  - gemfiles/Gemfile.rails50
+  - gemfiles/Gemfile.rails51
 
 sudo: false
 
 cache: bundler