diff --git a/Gemfile.lock b/Gemfile.lock
index b7fec7f..406d249 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -178,8 +178,8 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.3)
-    libv8 (5.3.332.38.1)
+    json (1.8.6)
+    libv8 (6.7.288.46.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -194,8 +194,8 @@ GEM
     mimemagic (0.3.2)
     mini_magick (4.5.1)
     mini_portile2 (2.1.0)
-    mini_racer (0.1.5)
-      libv8 (~> 5.3)
+    mini_racer (0.2.4)
+      libv8 (>= 6.3)
     minitest (5.9.1)
     morrisjs-rails (0.5.1)
       railties (> 3.1, < 5)
@@ -440,4 +440,4 @@ DEPENDENCIES
   yaml_db
 
 BUNDLED WITH
-   1.15.4
+   1.17.1