diff --git a/Gemfile.lock b/Gemfile.lock
index c0b84ff..6a8ee31 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -131,7 +131,7 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.14.0)
     msgpack (1.3.3)
-    mustermann (1.1.1)
+    mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.2)
     nokogiri (1.10.9)
@@ -146,10 +146,10 @@ GEM
     public_suffix (4.0.4)
     puma (4.3.3)
       nio4r (~> 2.0)
-    rack (2.2.2)
+    rack (2.2.4)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
-    rack-protection (2.0.8.1)
+    rack-protection (3.0.4)
       rack
     rack-proxy (0.6.5)
       rack
@@ -206,7 +206,7 @@ GEM
       rspec-mocks (~> 3.9)
       rspec-support (~> 3.9)
     rspec-support (3.9.3)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     ruby_dep (1.5.0)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
@@ -218,10 +218,10 @@ GEM
       sprockets (> 3.0)
       sprockets-rails
       tilt
-    sinatra (2.0.8.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
     spring (2.1.0)
     spring-watcher-listen (2.0.1)
@@ -236,7 +236,7 @@ GEM
       sprockets (>= 3.0.0)
     thor (1.0.1)
     thread_safe (0.3.6)
-    tilt (2.0.10)
+    tilt (2.0.11)
     tzinfo (1.2.7)
       thread_safe (~> 0.1)
     web-console (4.0.2)