diff --git a/Gemfile.lock b/Gemfile.lock
index 90556c0..8a386d0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -226,7 +226,7 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.3)
+    json (2.3.1)
     kgio (2.11.0)
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)