diff --git a/ruby/sinatra/image-upload-and-database/Gemfile.lock b/ruby/sinatra/image-upload-and-database/Gemfile.lock
index 296eb88..c42163a 100644
--- a/ruby/sinatra/image-upload-and-database/Gemfile.lock
+++ b/ruby/sinatra/image-upload-and-database/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
     haml (5.0.0)
       temple (>= 0.8.0)
       tilt
-    rack (1.6.5)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     sequel (4.40.0)