diff --git a/Gemfile.lock b/Gemfile.lock
index b5ecc04..f5993c7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
     eventmachine (1.2.7)
     lightly (0.2.1)
     mustermann (1.0.3)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rack-protection (2.0.5)
       rack
     sinatra (2.0.5)