diff --git a/config/mongoid.mongohq.yml b/config/mongoid.mongohq.yml
index c3a38cb..afe6ca9 100644
--- a/config/mongoid.mongohq.yml
+++ b/config/mongoid.mongohq.yml
@@ -5,5 +5,6 @@
 # commit it to your repo, then push to heroku.
 
 production:
-  uri: <%= ENV['MONGOHQ_URL'] %>
-  identity_map_enabled: true
+  sessions:
+    default:
+      uri: <%= ENV['MONGOHQ_URL'] %>
diff --git a/config/mongoid.mongolab.yml b/config/mongoid.mongolab.yml
index 1d8e8de..3444804 100644
--- a/config/mongoid.mongolab.yml
+++ b/config/mongoid.mongolab.yml
@@ -5,5 +5,6 @@
 # commit it to your repo, then push to heroku.
 
 production:
-  uri: <%= ENV['MONGOLAB_URI'] %>
-  identity_map_enabled: true
+  sesssions:
+    default:
+      uri: <%= ENV['MONGOLAB_URI'] %>
--
libgit2 0.21.2