diff --git a/Gemfile.lock b/Gemfile.lock
index 3f17ebd..2db332e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,7 +26,7 @@ GEM
     hiredis (0.6.1)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    json (2.1.0)
+    json (2.3.0)
     minitest (5.11.3)
     multi_json (1.13.1)
     multi_test (0.1.2)