diff --git a/Gemfile.lock b/Gemfile.lock
index d1173ca..849883e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -75,7 +75,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.0.4)
+    concurrent-ruby (1.0.5)
     contracts (0.15.0)
     crack (0.3.1)
     cucumber (2.4.0)
@@ -302,7 +302,7 @@ GEM
     turbolinks-source (5.0.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uglifier (3.0.4)
+    uglifier (3.1.0)
       execjs (>= 0.3.0, < 3)
     unicorn (5.2.0)
       kgio (~> 2.6)