diff --git a/Gemfile.lock b/Gemfile.lock
index 5e84b84..1041bd9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -76,7 +76,7 @@ GEM
     minitest (5.14.2)
     mono_logger (1.1.0)
     multi_json (1.15.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.4)
     nokogiri (1.10.10)
@@ -94,8 +94,8 @@ GEM
     prawn (2.3.0)
       pdf-core (~> 0.8.1)
       ttfunk (~> 1.6)
-    rack (2.2.3)
-    rack-protection (2.1.0)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -155,7 +155,7 @@ GEM
       rspec-mocks (~> 3.9)
       rspec-support (~> 3.9)
     rspec-support (3.10.0)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     rubyzip (2.3.0)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
@@ -173,10 +173,10 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.2)
-    sinatra (2.1.0)
-      mustermann (~> 1.0)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
       rack (~> 2.2)
-      rack-protection (= 2.1.0)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     sprockets (4.0.2)
       concurrent-ruby (~> 1.0)
@@ -188,7 +188,7 @@ GEM
     sqlite3 (1.3.13)
     thor (1.0.1)
     thread_safe (0.3.6)
-    tilt (2.0.10)
+    tilt (2.0.11)
     ttfunk (1.6.2.1)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)