diff --git a/compensating_transaction/Gemfile.lock b/compensating_transaction/Gemfile.lock
index c6540b5..b56e29d 100644
--- a/compensating_transaction/Gemfile.lock
+++ b/compensating_transaction/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     connection_pool (2.2.2)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-protection (2.0.8.1)
       rack
     redis (4.1.3)