diff --git a/mongoid_magic_counter_cache.gemspec b/mongoid_magic_counter_cache.gemspec
index e1b8b88..76b4e24 100644
--- a/mongoid_magic_counter_cache.gemspec
+++ b/mongoid_magic_counter_cache.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.add_dependency("mongoid", ">= 2.2", "<= 3.0")
+  s.add_dependency("mongoid", "~> 3.0.0")
   s.add_dependency("rake")
   s.add_development_dependency "rspec"
 end