diff --git a/Gemfile b/Gemfile
index ce0fe1b8..e50f9b90 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 gemspec
 
-ruby '2.1.6' if ENV.key?('DYNO')
+ruby '2.1.7' if ENV.key?('DYNO')
 
 gem 's3',              github: 'travis-ci/s3'