diff --git a/Gemfile.lock b/Gemfile.lock
index a7c9da3..37b6d33 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,6 +7,7 @@ GEM
       minitest (>= 5.1)
       tzinfo (~> 2.0)
       zeitwerk (~> 2.3)
+    base64 (0.2.0)
     concurrent-ruby (1.2.2)
     createsend (5.1.0)
       hashie (~> 3.0)
@@ -23,34 +24,41 @@ GEM
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
     json (2.5.1)
+    logger (1.6.1)
     mini_mime (1.1.2)
     minitest (5.19.0)
     multi_json (1.15.0)
     multi_xml (0.6.0)
-    mustermann (2.0.2)
+    mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.7.3)
     puma (5.6.9)
       nio4r (~> 2.0)
-    rack (2.2.8.1)
-    rack-protection (2.2.3)
-      rack
+    rack (3.1.8)
+    rack-protection (4.1.0)
+      base64 (>= 0.1.0)
+      logger (>= 1.6.0)
+      rack (>= 3.0.0, < 4)
+    rack-session (2.0.0)
+      rack (>= 3.0.0)
     rack-ssl-enforcer (0.2.9)
     redcarpet (3.5.1)
     ruby2_keywords (0.0.5)
-    sinatra (2.2.3)
-      mustermann (~> 2.0)
-      rack (~> 2.2)
-      rack-protection (= 2.2.3)
+    sinatra (4.1.0)
+      logger (>= 1.6.0)
+      mustermann (~> 3.0)
+      rack (>= 3.0.0, < 4)
+      rack-protection (= 4.1.0)
+      rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
-    sinatra-contrib (2.2.3)
-      multi_json
-      mustermann (~> 2.0)
-      rack-protection (= 2.2.3)
-      sinatra (= 2.2.3)
+    sinatra-contrib (4.1.0)
+      multi_json (>= 0.0.2)
+      mustermann (~> 3.0)
+      rack-protection (= 4.1.0)
+      sinatra (= 4.1.0)
       tilt (~> 2.0)
     temple (0.8.2)
-    tilt (2.0.11)
+    tilt (2.4.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     zeitwerk (2.6.11)