diff --git a/Gemfile.lock b/Gemfile.lock
index 7e55fce..90d7493 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,7 +58,7 @@ GEM
     method_source (0.8.1)
     mime-types (1.23)
     minitest (4.7.5)
-    multi_json (1.7.7)
+    multi_json (1.15.0)
     pg (0.15.1)
     polyglot (0.3.3)
     pry (0.9.12.2)
@@ -67,7 +67,7 @@ GEM
       slop (~> 3.4)
     quiet_assets (1.0.2)
       railties (>= 3.1, < 5.0)
-    rack (1.5.2)
+    rack (1.5.5)
     rack-test (0.6.2)
       rack (>= 1.0)
     rails (4.0.0)
@@ -100,7 +100,7 @@ GEM
       json (>= 1.1.3)
       rdoc (~> 3.10)
     slop (3.4.5)
-    sprockets (2.10.0)
+    sprockets (2.12.5)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)