diff --git a/src/ruby-sinatra/Gemfile.lock b/src/ruby-sinatra/Gemfile.lock
index 60621d5..8490ed6 100644
--- a/src/ruby-sinatra/Gemfile.lock
+++ b/src/ruby-sinatra/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    json (1.5.5)
+    json (2.3.0)
     macaddr (1.5.0)
       systemu (>= 2.4.0)
     multi_json (1.0.4)