diff --git a/inch.gemspec b/inch.gemspec
index 53202a4..f371078 100644
--- a/inch.gemspec
+++ b/inch.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(/^(test|spec|features)\//)
   spec.require_paths = ['lib']
 
-  spec.add_development_dependency 'bundler', '~> 1.5'
+  spec.add_development_dependency 'bundler', '>= 1.5'
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'minitest', '~> 5.2'