diff --git a/Gemfile.lock b/Gemfile.lock
index e597316..c25994a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -57,7 +57,7 @@ GEM
     dotenv-rails (0.10.0)
       dotenv (= 0.10.0)
     erubis (2.7.0)
-    execjs (2.0.2)
+    execjs (2.8.1)
     gravtastic (3.2.6)
     hike (1.2.3)
     i18n (0.6.5)
@@ -73,7 +73,7 @@ GEM
       treetop (~> 1.4.8)
     mime-types (1.25)
     mini_portile (0.5.2)
-    multi_json (1.8.2)
+    multi_json (1.15.0)
     nokogiri (1.6.1)
       mini_portile (~> 0.5.0)
     orm_adapter (0.4.0)
@@ -145,9 +145,9 @@ GEM
       polyglot
       polyglot (>= 0.3.1)
     tzinfo (0.3.38)
-    uglifier (2.2.1)
+    uglifier (2.7.2)
       execjs (>= 0.3.0)
-      multi_json (~> 1.0, >= 1.0.2)
+      json (>= 1.8.0)
     uuidtools (2.1.4)
     warden (1.2.3)
       rack (>= 1.0)