diff --git a/ruby/showoff/Gemfile.lock b/ruby/showoff/Gemfile.lock
index e5b5d44..ae3f0ec 100644
--- a/ruby/showoff/Gemfile.lock
+++ b/ruby/showoff/Gemfile.lock
@@ -20,7 +20,7 @@ GEM
     parslet (1.5.0)
       blankslate (~> 2.0)
     pdfkit (0.5.3)
-    rack (1.5.2)
+    rack (1.6.12)
     rack-protection (1.5.0)
       rack
     redcarpet (2.2.2)