diff --git a/Gemfile b/Gemfile
index b53a1b08..fe5d21d4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-ruby '2.1.2'
+ruby '2.1.2' if ENV.key?('DYNO')
 
 source 'https://rubygems.org'
 gemspec
diff --git a/Gemfile.lock b/Gemfile.lock
index f2651e11..77cf9527 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -74,7 +74,7 @@ GIT
 
 GIT
   remote: git://github.com/travis-ci/travis-yaml.git
-  revision: 2c6ac75077123095e2ee8e8db435342ba2d03c2d
+  revision: 797edde6d0d009c827523a765ab84262fa6d56db
   specs:
     travis-yaml (0.1.0)