diff --git a/Gemfile.lock b/Gemfile.lock
index 52a7907..8a2691e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
     guid (0.1.1)
     json (2.3.1)
     method_source (1.0.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.4)
     pry (0.13.1)
@@ -13,18 +13,18 @@ GEM
       method_source (~> 1.0)
     puma (5.0.2)
       nio4r (~> 2.0)
-    rack (2.2.3)
-    rack-protection (2.1.0)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     redis (4.2.2)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     secure_yaml (2.0.2)
-    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)
 
 PLATFORMS
   ruby