diff --git a/Gemfile.lock b/Gemfile.lock
index 93a4bfc..87eac8f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -77,7 +77,7 @@ GEM
     http_parser.rb (0.6.0)
     i18n (1.0.1)
       concurrent-ruby (~> 1.0)
-    json (2.1.0)
+    json (2.3.1)
     loofah (2.2.2)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)