--- a/omniauth-twitter.gemspec
+++ b/omniauth-twitter.gemspec
@@ -17,7 +17,7 @@
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.add_dependency 'json', '~> 1.3'
+  s.add_dependency 'json', '>= 1.3'
   s.add_dependency 'omniauth-oauth', '~> 1.1'
   s.add_development_dependency 'bundler', '~> 1.0'
 end