diff --git a/ruby-sinatra/Gemfile.lock b/ruby-sinatra/Gemfile.lock
index 64700d4..651879e 100644
--- a/ruby-sinatra/Gemfile.lock
+++ b/ruby-sinatra/Gemfile.lock
@@ -5,12 +5,12 @@ GEM
       timers (~> 4.0.0)
     daemons (1.1.9)
     eventmachine (1.0.3)
-    ffi (1.9.4)
+    ffi (1.13.1)
     haml (4.0.5)
       tilt
     hitimes (1.2.2)
     httpclient (2.4.0)
-    json (1.8.1)
+    json (2.3.0)
     listen (2.7.9)
       celluloid (>= 0.15.2)
       rb-fsevent (>= 0.9.3)