diff --git a/Gemfile.lock b/Gemfile.lock
index 5f00fb5..ec58c04 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -77,8 +77,7 @@ GEM
     diff-lcs (1.3)
     erubis (2.7.0)
     eventmachine (1.0.3)
-    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)
@@ -278,9 +277,9 @@ GEM
       jwt (~> 1.0)
       multi_json (>= 1.3.0)
     tzinfo (0.3.60)
-    uglifier (1.3.0)
+    uglifier (2.7.2)
       execjs (>= 0.3.0)
-      multi_json (~> 1.0, >= 1.0.2)
+      json (>= 1.8.0)
     whenever (0.9.4)
       chronic (>= 0.6.3)
     will_paginate (3.1.6)