diff --git a/mongo.gemspec b/mongo.gemspec
index 7d0b557..f202c35 100644
--- a/mongo.gemspec
+++ b/mongo.gemspec
@@ -30,5 +30,5 @@ Gem::Specification.new do |s|
   s.email = 'mongodb-dev@googlegroups.com'
   s.homepage = 'http://www.mongodb.org'
 
-  s.add_dependency(%q<bson>, [">= #{Mongo::VERSION}"])
+  s.add_dependency('bson', Mongo::VERSION)
 end