diff --git a/service_broker/Gemfile.lock b/service_broker/Gemfile.lock
index 9edadfa..5786bf8 100644
--- a/service_broker/Gemfile.lock
+++ b/service_broker/Gemfile.lock
@@ -39,7 +39,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (4.0.6)
-    rack (2.2.3)
+    rack (2.2.6.4)
     rack-protection (2.0.2)
       rack
     rack-test (0.7.0)