diff --git a/Gemfile.lock b/Gemfile.lock
index ae76eb0e..5314d0dc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -77,7 +77,7 @@ GEM
     httpclient (2.8.3)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    json (2.2.0)
+    json (2.3.1)
     minitest (5.11.3)
     molinillo (0.6.6)
     nanaimo (0.2.6)