diff --git a/Gemfile.lock b/Gemfile.lock
index 86c1ebe..37902ef 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -56,8 +56,7 @@ GEM
     debugger-ruby_core_source (1.2.3)
     diff-lcs (1.2.4)
     erubis (2.7.0)
-    execjs (1.4.0)
-      multi_json (~> 1.0)
+    execjs (2.8.1)
     factory_girl (4.2.0)
       activesupport (>= 3.0.0)
     factory_girl_rails (4.2.1)
@@ -93,7 +92,7 @@ GEM
     mime-types (1.23)
     mini_portile (0.5.1)
     minitest (4.7.5)
-    multi_json (1.7.8)
+    multi_json (1.15.0)
     multipart-post (1.2.0)
     nokogiri (1.6.0)
       mini_portile (~> 0.5.0)
@@ -190,9 +189,9 @@ GEM
       polyglot
       polyglot (>= 0.3.1)
     tzinfo (0.3.37)
-    uglifier (2.1.2)
+    uglifier (2.7.2)
       execjs (>= 0.3.0)
-      multi_json (~> 1.0, >= 1.0.2)
+      json (>= 1.8.0)
     unicorn (4.6.3)
       kgio (~> 2.6)
       rack