diff --git a/Gemfile.lock b/Gemfile.lock
index 203b795..5c3313d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,7 +29,7 @@ GEM
     pg (1.0.0)
     powerpack (0.1.2)
     public_suffix (3.0.2)
-    rack (2.0.5)
+    rack (2.2.8.1)
     rack-protection (2.0.3)
       rack
     rack-test (1.0.0)