diff --git a/Gemfile.lock b/Gemfile.lock
index 75ab01e..44ea4f8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,7 +9,7 @@ GEM
     minitest (5.12.2)
     mustermann (1.0.3)
     open4 (1.3.4)
-    rack (2.0.7)
+    rack (2.2.3)
     rack-protection (2.0.7)
       rack
     rake (12.3.3)