diff --git a/Gemfile.lock b/Gemfile.lock
index f65697a..b423ef0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,7 +24,6 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
       zeitwerk (~> 2.2)
-    backports (3.15.0)
     concurrent-ruby (1.1.5)
     daemons (1.3.1)
     eventmachine (1.2.7)
@@ -33,30 +32,29 @@ GEM
     minitest (5.13.0)
     multi_json (1.14.1)
     mustache (1.1.1)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
-    rack (2.0.8)
-    rack-protection (2.0.8.1)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
-    ruby2_keywords (0.0.1)
-    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)
-    sinatra-contrib (2.0.8.1)
-      backports (>= 2.8.2)
+    sinatra-contrib (2.2.3)
       multi_json
-      mustermann (~> 1.0)
-      rack-protection (= 2.0.8.1)
-      sinatra (= 2.0.8.1)
+      mustermann (~> 2.0)
+      rack-protection (= 2.2.3)
+      sinatra (= 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)
     thread_safe (0.3.6)
-    tilt (2.0.10)
+    tilt (2.0.11)
     typesafe_enum (0.1.9)
     tzinfo (1.2.6)
       thread_safe (~> 0.1)