diff --git a/Gemfile.lock b/Gemfile.lock
index 824bc27..e787654 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -241,7 +241,7 @@ GEM
     minitest (5.15.0)
     multi_json (1.15.0)
     multipart-post (2.4.1)
-    mustermann (2.0.2)
+    mustermann (3.0.4)
       ruby2_keywords (~> 0.0.1)
     nokogiri (1.12.5-x86_64-linux)
       racc (~> 1.4)
@@ -252,9 +252,14 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (4.0.7)
     racc (1.8.1)
-    rack (2.2.17)
-    rack-protection (2.2.4)
-      rack
+    rack (3.2.3)
+    rack-protection (4.2.0)
+      base64 (>= 0.1.0)
+      logger (>= 1.6.0)
+      rack (>= 3.0.0, < 4)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
@@ -274,21 +279,23 @@ GEM
       addressable (>= 2.3.5)
       faraday (>= 0.17.3, < 3)
     simpleidn (0.2.3)
-    sinatra (2.2.4)
-      mustermann (~> 2.0)
-      rack (~> 2.2)
-      rack-protection (= 2.2.4)
+    sinatra (4.2.0)
+      logger (>= 1.6.0)
+      mustermann (~> 3.0)
+      rack (>= 3.0.0, < 4)
+      rack-protection (= 4.2.0)
+      rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
-    sinatra-contrib (2.2.4)
-      multi_json
-      mustermann (~> 2.0)
-      rack-protection (= 2.2.4)
-      sinatra (= 2.2.4)
+    sinatra-contrib (4.2.0)
+      multi_json (>= 0.0.2)
+      mustermann (~> 3.0)
+      rack-protection (= 4.2.0)
+      sinatra (= 4.2.0)
       tilt (~> 2.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)
-    tilt (2.6.0)
+    tilt (2.6.1)
     typhoeus (1.4.1)
       ethon (>= 0.9.0)
     tzinfo (1.2.11)