diff --git a/Gemfile b/Gemfile
index 0254dfd2..556db057 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,7 +23,6 @@ gem 'unicorn'
 gem 'omniauth', :git => 'git://github.com/intridea/omniauth.git'
 gem "sinatra", :require => "sinatra/base"
 gem "mongo_mapper"
-gem "mongomapper_ext"
 gem "bson_ext"
 gem "i18n"
 gem "twitter"
diff --git a/Gemfile.lock b/Gemfile.lock
index d005d737..2bf19ca8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -173,9 +173,6 @@ GEM
       activemodel (~> 3.0)
       activesupport (~> 3.0)
       plucky (~> 0.3.8)
-    mongomapper_ext (0.5.1)
-      mongo_mapper (~> 0.8)
-      uuidtools (>= 2.0.0)
     multi_json (1.0.3)
     multi_xml (0.2.2)
     multipart-post (1.1.3)
@@ -299,7 +296,6 @@ GEM
       kgio (~> 2.4)
       rack
       raindrops (~> 0.6)
-    uuidtools (2.1.2)
     vcr (1.10.3)
     webmock (1.6.4)
       addressable (> 2.2.5, ~> 2.2)
@@ -333,7 +329,6 @@ DEPENDENCIES
   launchy
   mocha
   mongo_mapper
-  mongomapper_ext
   nokogiri
   omniauth!
   opub