diff --git a/Gemfile.lock b/Gemfile.lock
index 8429591..5253790 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
       temple (>= 0.8.0)
       tilt
     mustermann (1.0.3)
-    rack (2.0.6)
+    rack (2.2.3)
     rack-protection (2.0.5)
       rack
     sinatra (2.0.5)