diff --git a/Gemfile.lock b/Gemfile.lock
index 69d88a1..b477475 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,9 +1,8 @@
 GIT
-  remote: git://github.com/rails-api/active_model_serializers.git
-  revision: 42644544e1776d74f603380c034292467bcd7ad9
+  remote: https://github.com/rails-api/active_model_serializers.git
+  revision: beeb216fab286537389788349c513264325393ef
   specs:
-    active_model_serializers (0.10.0.pre)
-      activemodel (>= 4.0)
+    active_model_serializers (1.0.0.pre.dev)
 
 GEM
   remote: https://rubygems.org/
@@ -76,6 +75,7 @@ GEM
       execjs
     coffee-script-source (1.9.0)
     columnize (0.9.0)
+    crass (1.0.6)
     debug_inspector (0.0.2)
     debugger-linecache (1.2.0)
     diff-lcs (1.2.5)
@@ -127,7 +127,8 @@ GEM
       actionpack (>= 3.0)
       activerecord (>= 3.0)
       railties (>= 3.0)
-    loofah (2.0.1)
+    loofah (2.19.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.9)
     mail (2.6.3)