diff --git a/test/test_helper.rb b/test/test_helper.rb
index e66273b8..eec4e154 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -7,7 +7,7 @@
 require 'sqlite3'
 
 require 'shoulda'
-require 'turn' unless ENV["TM_FILEPATH"] || ENV["CI"]
+require 'turn/autorun' unless ENV["TM_FILEPATH"] || ENV["CI"]
 require 'mocha'
 
 require 'active_support/core_ext/hash/indifferent_access'
diff --git a/tire.gemspec b/tire.gemspec
index 08d36691..a19c56e3 100644
--- a/tire.gemspec
+++ b/tire.gemspec
@@ -38,18 +38,17 @@ Gem::Specification.new do |s|
   s.add_development_dependency "yajl-ruby",   "~> 0.8.0"
   s.add_development_dependency "shoulda"
   s.add_development_dependency "mocha"
-  s.add_development_dependency "activerecord", "~> 3.0.7"
+  s.add_development_dependency "activerecord", "~> 3"
   s.add_development_dependency "mongoid",      "~> 2.2.1"
   s.add_development_dependency "sqlite3"
-  s.add_development_dependency "supermodel"
+  s.add_development_dependency "supermodel",   "~> 0.1.6"
   s.add_development_dependency "curb"
 
   # These gems are not needed for CI at <http://travis-ci.org/#!/karmi/tire>
   #
   unless ENV["CI"]
     s.add_development_dependency "rdoc"
-    s.add_development_dependency "rcov"
-    s.add_development_dependency "turn"
+    s.add_development_dependency "turn", "~> 0.9"
   end
 
   s.description = <<-DESC