diff --git a/Gemfile.lock b/Gemfile.lock
index eaa8c17..7889f2d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,7 +22,7 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.10)
     method_source (1.0.0)
     minitest (5.14.4)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.8)
     pg (1.2.3)
@@ -31,8 +31,8 @@ GEM
       method_source (~> 1.0)
     puma (5.4.0)
       nio4r (~> 2.0)
-    rack (2.2.3)
-    rack-protection (2.1.0)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
@@ -40,12 +40,12 @@ GEM
     rerun (0.13.1)
       listen (~> 3.0)
     ruby2_keywords (0.0.5)
-    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)