diff --git a/grouped_scope.gemspec b/grouped_scope.gemspec
index 5d6561f..b3417d2 100644
--- a/grouped_scope.gemspec
+++ b/grouped_scope.gemspec
@@ -15,11 +15,11 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ['lib']
   s.rdoc_options  = ['--charset=UTF-8']
-  s.add_runtime_dependency 'activerecord' # , '~> 3.2.0'
+  s.add_runtime_dependency 'activerecord' , '= 4.0.13'
   s.add_development_dependency 'sqlite3',      '~> 1.3'
   s.add_development_dependency 'rake',         '~> 0.9.2'
-  s.add_development_dependency 'minitest',     '~> 2.8.1'
-  s.add_development_dependency 'factory_girl', '~> 2.3.2'
+  s.add_development_dependency 'minitest' #,     '~> 2.8.1'
+  s.add_development_dependency 'factory_girl' #, '~> 2.3.2'
   s.add_development_dependency 'mocha',        '~> 0.10.0'
 end