diff --git a/2017-01-29-deep-dive-into-database-timeouts-in-rails/Gemfile.lock b/2017-01-29-deep-dive-into-database-timeouts-in-rails/Gemfile.lock
index 7d11541..0aac431 100644
--- a/2017-01-29-deep-dive-into-database-timeouts-in-rails/Gemfile.lock
+++ b/2017-01-29-deep-dive-into-database-timeouts-in-rails/Gemfile.lock
@@ -67,7 +67,7 @@ GEM
     nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     puma (3.12.6)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-test (0.7.0)
       rack (>= 1.0, < 3)
     rails (5.1.4)