diff --git a/twocheckout.gemspec b/twocheckout.gemspec
index 02a2890..80ad5d6 100755
--- a/twocheckout.gemspec
+++ b/twocheckout.gemspec
@@ -14,7 +14,7 @@ Gem::Specification.new do |s|
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
-  s.add_dependency('rest-client', '~> 1.4')
+  s.add_dependency('rest-client', '>= 1.4')
   s.require_paths = %w{lib}
   s.requirements << 'none'
   s.license = 'MIT'