diff --git a/Gemfile b/Gemfile
index b4fa2e3..6315bf4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source :gemcutter
 
-gem "activerecord"
+gem "activerecord", "~> 3.0"
 
 group :development do
   gem "rake"
diff --git a/Gemfile.lock b/Gemfile.lock
index b6e8827..097363d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -65,7 +65,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  activerecord
+  activerecord (~> 3.0)
   activerecord-jdbcmysql-adapter
   delorean (~> 0.2.0)
   factory_girl (~> 1.3.3)