diff --git a/Gemfile.lock b/Gemfile.lock
index dc8bbb1..82b99d4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
       temple (>= 0.8.0)
       tilt
     mustermann (1.0.3)
-    rack (2.0.7)
+    rack (2.2.3)
     rack-protection (2.0.7)
       rack
     sinatra (2.0.7)