diff --git a/apps/sinatra/Gemfile.lock b/apps/sinatra/Gemfile.lock
index 7ce9884..96c3391 100644
--- a/apps/sinatra/Gemfile.lock
+++ b/apps/sinatra/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    rack (1.6.5)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     sinatra (1.4.7)