diff --git a/Gemfile.lock b/Gemfile.lock
index d54abcd..0bc45ea 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GEM
     json (2.2.0)
     multi_json (1.13.1)
     mustermann (1.0.3)
-    rack (2.0.7)
+    rack (2.2.3)
     rack-protection (2.0.5)
       rack
     sinatra (2.0.5)