diff --git a/Gemfile.lock b/Gemfile.lock
index a0047a0..cefc239 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -78,7 +78,7 @@ GEM
     multi_json (1.15.0)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nokogiri (1.13.3)
       mini_portile2 (~> 2.8.0)
@@ -102,8 +102,8 @@ GEM
     public_suffix (4.0.6)
     racc (1.6.0)
     racc (1.6.0-java)
-    rack (2.2.3)
-    rack-protection (2.2.0)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
@@ -129,15 +129,15 @@ GEM
     rspec-support (3.5.0)
     ruby2_keywords (0.0.5)
     semver (1.0.1)
-    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)
     stringio (3.0.1)
     thread_safe (0.3.6)
     thread_safe (0.3.6-java)
-    tilt (2.0.10)
+    tilt (2.0.11)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
     tzinfo-data (1.2021.5)