diff --git a/Gemfile.lock b/Gemfile.lock
index fa49866d22..4db6083418 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -127,7 +127,7 @@ GEM
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
     io-event (1.7.4)
-    json (2.8.2)
+    json (2.9.0)
     kramdown (2.5.1)
       rexml (>= 3.3.9)
     listen (3.9.0)