diff --git a/Gemfile.lock b/Gemfile.lock
index 2e04a34..62e830d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
     mime-types-data (3.2020.0512)
     mini_portile2 (2.6.1)
     multi_xml (0.6.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.7)
     nokogiri (1.12.5)
@@ -29,8 +29,8 @@ GEM
     puma (4.3.5)
       nio4r (~> 2.0)
     racc (1.5.2)
-    rack (2.2.3)
-    rack-protection (2.0.8.1)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rake (13.0.1)
     rb-fsevent (0.10.3)
@@ -38,17 +38,17 @@ GEM
       ffi (~> 1.0)
     rerun (0.13.0)
       listen (~> 3.0)
-    ruby2_keywords (0.0.2)
-    sinatra (2.0.8.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby