diff --git a/Gemfile.lock b/Gemfile.lock
index 16c73a3..6b42521 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     daemons (1.2.6)
     eventmachine (1.2.6)
     mustermann (1.0.2)
-    rack (2.2.3)
+    rack (2.2.6.4)
     rack-protection (2.0.1)
       rack
     sinatra (2.0.1)