diff --git a/app/models/feed.rb b/app/models/feed.rb
index f3dcf0e..9271d1f 100644
--- a/app/models/feed.rb
+++ b/app/models/feed.rb
@@ -1,4 +1,4 @@
-class Feed
+class Feed < ActiveRecord::Base
   has_many :posts, :dependent => :destroy
 
   validates :title, :presence => true
diff --git a/app/models/post.rb b/app/models/post.rb
index f5799b4..73fe0d4 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -1,4 +1,4 @@
-class Post
+class Post < ActiveRecord::Base
   belongs_to :feed
   
   EARTH_RADIUS_M = 6378000
diff --git a/app/models/user.rb b/app/models/user.rb
index 27c786f..1afe6a4 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,4 +1,4 @@
-class User
+class User < ActiveRecord::Base
   authenticates_with_sorcery!
 #   attr_accessible :email, :password, :password_confirmation