diff --git a/web/Gemfile.lock b/web/Gemfile.lock
index b3389c2..15f5da8 100644
--- a/web/Gemfile.lock
+++ b/web/Gemfile.lock
@@ -47,7 +47,7 @@ GEM
     globalid (0.3.6)
       activesupport (>= 4.1.0)
     i18n (0.7.0)
-    json (1.8.3)
+    json (2.3.1)
     listen (3.0.6)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9.7)