diff --git a/instapaper.gemspec b/instapaper.gemspec
index 7ba0c22..2a539a0 100644
--- a/instapaper.gemspec
+++ b/instapaper.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency('webmock', '~> 1.7')
 
   gem.add_runtime_dependency('faraday_middleware', '~> 0.7')
-  gem.add_runtime_dependency('multi_json', '~> 1.0.3')
+  gem.add_runtime_dependency('multi_json', '~> 1')
   gem.add_runtime_dependency('rash', '~> 0.3')
   gem.add_runtime_dependency('simple_oauth', '~> 0.1')