diff --git a/Gemfile.lock b/Gemfile.lock
index bd11fa4..bf4147e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -74,8 +74,8 @@ GEM
       sprockets (~> 2.1)
       sprockets-helpers (~> 1.0.0)
       sprockets-sass (~> 1.0.0)
-    multi_json (1.8.2)
-    rack (1.5.2)
+    multi_json (1.15.0)
+    rack (1.6.13)
     rack-coderay (0.2.0)
       coderay (>= 0.8.312)
       hpricot (>= 0.8.1)
@@ -92,7 +92,7 @@ GEM
     rdiscount (1.6.8)
     ref (1.0.5)
     sass (3.1.21)
-    sprockets (2.10.1)
+    sprockets (2.12.5)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)