diff --git a/Gemfile.lock b/Gemfile.lock
index ae3c9de..cda7aaf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -52,7 +52,7 @@ GEM
       guard (~> 2.0)
       rubocop (~> 0.20)
     jaro_winkler (1.5.2)
-    json (2.2.0)
+    json (2.3.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)