diff --git a/Gemfile.lock b/Gemfile.lock
index b6243ef..483b1a3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -68,7 +68,7 @@ GEM
       json (>= 1.4.6)
     hike (1.2.1)
     i18n (0.6.0)
-    json (1.5.4)
+    json (2.3.1)
     mail (2.3.0)
       i18n (>= 0.4.0)
       mime-types (~> 1.16)