diff --git a/app/models/comment.rb b/app/models/comment.rb
index c93347a..e11333c 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -28,8 +28,8 @@ class Comment < ActiveRecord::Base
     indexes comment
     indexes user.username, :as => :author
 
-    has "(upvotes - downvotes)", :as => :score, :type => :integer,
-      :sortable => true
+    has "(cast(upvotes as signed) - cast(downvotes as signed))",
+      :as => :score, :type => :bigint, :sortable => true
 
     has is_deleted
     has created_at
diff --git a/app/models/story.rb b/app/models/story.rb
index d0b6556..974aed2 100644
--- a/app/models/story.rb
+++ b/app/models/story.rb
@@ -33,8 +33,8 @@ class Story < ActiveRecord::Base
 
     has created_at, :sortable => true
     has hotness, is_expired
-    has "(cast(upvotes as int) - cast(downvotes as int))",
-      :as => :score, :type => :integer, :sortable => true
+    has "(cast(upvotes as signed) - cast(downvotes as signed))",
+      :as => :score, :type => :bigint, :sortable => true
 
     set_property :field_weights => {
       :upvotes => 15,