diff --git a/Gemfile.lock b/Gemfile.lock
index 8233cc7..1b11597 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,7 +37,7 @@ GEM
       rspec (>= 2.99.0, < 4.0)
     hashie (3.6.0)
     jaro_winkler (1.5.2)
-    json (2.1.0)
+    json (2.5.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)