diff --git a/Gemfile.lock b/Gemfile.lock
index c5dbfb9..e094826 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -34,7 +34,7 @@ GEM
       activesupport
     method_source (1.0.0)
     minitest (5.14.4)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     pry (0.14.1)
       coderay (~> 1.1)
@@ -44,7 +44,7 @@ GEM
       rack (~> 2.0)
     rack-parser (0.7.0)
       rack
-    rack-protection (2.1.0)
+    rack-protection (2.2.3)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -64,14 +64,14 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.10.0)
     rspec-support (3.10.2)
-    ruby2_keywords (0.0.4)
+    ruby2_keywords (0.0.5)
     rubysl-base64 (2.0.0)
-    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)
-    tilt (2.0.10)
+    tilt (2.0.11)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
     zeitwerk (2.4.2)