diff --git a/Gemfile.lock b/Gemfile.lock
index 29a3268..d41e1db 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,11 +26,11 @@ GEM
     mime-types-data (3.2020.0425)
     minitest (5.16.2)
     multi_xml (0.6.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     pg (1.2.3)
     rack (2.2.4)
-    rack-protection (2.2.0)
+    rack-protection (2.2.3)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -49,16 +49,16 @@ GEM
       rspec-support (~> 3.9.0)
     rspec-support (3.9.3)
     ruby2_keywords (0.0.5)
-    sinatra (2.2.0)
-      mustermann (~> 1.0)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
       rack (~> 2.2)
-      rack-protection (= 2.2.0)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     sinatra-activerecord (2.0.18)
       activerecord (>= 4.1)
       sinatra (>= 1.0)
     sqlite3 (1.4.2)
-    tilt (2.0.10)
+    tilt (2.0.11)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
     zeitwerk (2.6.0)