diff --git a/execjs.gemspec b/execjs.gemspec
index 55fe941..e52cf95 100644
--- a/execjs.gemspec
+++ b/execjs.gemspec
@@ -11,7 +11,6 @@ Gem::Specification.new do |s|
 
   s.files = Dir["README.md", "LICENSE", "lib/**/*"]
 
-  s.add_dependency "multi_json", "~>1.0"
   s.add_development_dependency "rake"
 
   s.licenses = ['MIT']