diff --git a/Gemfile.lock b/Gemfile.lock
index 3745e44..16a765f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -34,7 +34,7 @@ GEM
     ffi (1.13.1)
     i18n (1.8.3)
       concurrent-ruby (~> 1.0)
-    json (2.1.0)
+    json (2.3.0)
     listen (3.2.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)