diff --git a/Gemfile.lock b/Gemfile.lock
index e768335..1a137de 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,20 +5,20 @@ GEM
       public_suffix (>= 2.0.2, < 5.0)
     json-schema (2.8.0)
       addressable (>= 2.4)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     public_suffix (3.1.1)
     rack (2.2.4)
-    rack-protection (2.2.0)
+    rack-protection (2.2.3)
       rack
     rouge (2.0.7)
     ruby2_keywords (0.0.5)
-    sinatra (2.2.0)
-      mustermann (~> 1.0)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
       rack (~> 2.2)
-      rack-protection (= 2.2.0)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby