.rubocop.yml in gist_updater-0.4.5 vs .rubocop.yml in gist_updater-0.4.6

@@ -1,10 +1,10 @@
 AllCops:
   Exclude:
     - Rakefile
     - bin/*
     - vendor/**/*
-  TargetRubyVersion: 2.2
+  TargetRubyVersion: 2.3
 
 Metrics/BlockLength:
   Exclude:
     - spec/**/*