diff --git a/Gemfile.lock b/Gemfile.lock
index 0f31e3fb..b81b7186 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,11 +13,11 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.3.3)
+    concurrent-ruby (1.1.8)
     diff-lcs (1.2.4)
     execjs (1.4.0)
       multi_json (~> 1.0)
     ffi (1.9.0)
-    hike (1.2.1)
     jasmine (1.3.2)
       jasmine-core (~> 1.3.1)
       rack (~> 1.0)
@@ -30,7 +30,7 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.7.1)
       slop (>= 2.4.4, < 3)
-    rack (1.4.1)
+    rack (1.6.13)
     rake (10.1.0)
     rspec (2.14.0)
       rspec-core (~> 2.14.0)
@@ -47,11 +47,9 @@ GEM
       rubyzip (~> 1.0.0)
       websocket (~> 1.0.4)
     slop (2.4.4)
-    sprockets (2.1.2)
-      hike (~> 1.2)
-      rack (~> 1.0)
-      tilt (~> 1.1, != 1.3.0)
-    tilt (1.3.3)
+    sprockets (4.0.2)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
     websocket (1.0.7)
 
 PLATFORMS