diff --git a/Gemfile.lock b/Gemfile.lock
index 69b168f..c8aa01f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,15 +20,16 @@ GEM
       concurrent-ruby (~> 1.0)
     method_source (0.9.2)
     minitest (5.12.2)
-    mustermann (1.0.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     pry-byebug (3.7.0)
       byebug (~> 11.0)
       pry (~> 0.10)
-    rack (2.0.7)
-    rack-protection (2.0.7)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
@@ -43,14 +44,15 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.2)
-    sinatra (2.0.7)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.7)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     sqlite3 (1.4.1)
     thread_safe (0.3.6)
-    tilt (2.0.10)
+    tilt (2.0.11)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     zeitwerk (2.1.10)