Use the latests Rails version

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: git://github.com/mongoid/mongoid.git
-  revision: 124627a60020c081a50136dd49e6c6652e7226c5
+  revision: 6c8b3f2501ad12dbd453a86d3fe2374a4d14378c
   branch: master
   specs:
     mongoid (4.0.0)
@@ -11,7 +11,7 @@ GIT
 
 GIT
   remote: git://github.com/rails/rails.git
-  revision: 202041e762a98cb433c3a24a0b03308d4e05a99d
+  revision: 27d12bde1f2ef9bac24d24d576f23eee68544ca0
   branch: master
   specs:
     actionmailer (4.0.0.beta1)
@@ -30,13 +30,13 @@ GIT
       activemodel (= 4.0.0.beta1)
       activerecord-deprecated_finders (~> 0.0.3)
       activesupport (= 4.0.0.beta1)
-      arel (~> 4.0.0.beta1)
+      arel (~> 4.0.0.beta2)
     activesupport (4.0.0.beta1)
-      i18n (~> 0.6.2)
+      i18n (~> 0.6, >= 0.6.4)
       minitest (~> 4.2)
       multi_json (~> 1.3)
       thread_safe (~> 0.1)
-      tzinfo (~> 0.3.33)
+      tzinfo (~> 0.3.37)
     rails (4.0.0.beta1)
       actionmailer (= 4.0.0.beta1)
       actionpack (= 4.0.0.beta1)
@@ -62,36 +62,36 @@ PATH
       warden (~> 1.2.1)
 
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     activerecord-deprecated_finders (0.0.3)
-    arel (4.0.0.beta1)
+    arel (4.0.0.beta2)
     atomic (1.0.1)
     bcrypt-ruby (3.0.1)
     builder (3.1.4)
     erubis (2.7.0)
-    faraday (0.8.6)
+    faraday (0.8.7)
       multipart-post (~> 1.1)
     hashie (1.2.0)
     hike (1.2.1)
     httpauth (0.2.0)
-    i18n (0.6.2)
+    i18n (0.6.4)
     json (1.7.7)
-    jwt (0.1.5)
-      multi_json (>= 1.0)
+    jwt (0.1.8)
+      multi_json (>= 1.5)
     mail (2.5.3)
       i18n (>= 0.4.0)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     metaclass (0.0.1)
     mime-types (1.21)
-    minitest (4.6.1)
-    mocha (0.13.2)
+    minitest (4.7.0)
+    mocha (0.13.3)
       metaclass (~> 0.0.1)
-    moped (1.4.2)
-    multi_json (1.6.1)
-    multipart-post (1.1.5)
-    nokogiri (1.5.6)
+    moped (1.4.5)
+    multi_json (1.7.2)
+    multipart-post (1.2.0)
+    nokogiri (1.5.9)
     oauth2 (0.8.1)
       faraday (~> 0.8)
       httpauth (~> 0.1)
@@ -120,7 +120,7 @@ GEM
       ruby-openid (>= 2.1.8)
     rack-test (0.6.2)
       rack (>= 1.0)
-    rake (10.0.3)
+    rake (10.0.4)
     rdoc (3.12.2)
       json (~> 1.4)
     ruby-openid (2.2.3)
@@ -134,14 +134,14 @@ GEM
       activesupport (>= 3.0)
       sprockets (~> 2.8)
     sqlite3 (1.3.7)
-    thor (0.17.0)
+    thor (0.18.0)
     thread_safe (0.1.0)
       atomic
-    tilt (1.3.3)
+    tilt (1.3.6)
     treetop (1.4.12)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.35)
+    tzinfo (0.3.37)
     warden (1.2.1)
       rack (>= 1.0)
     webrat (0.7.2)