diff --git a/Gemfile.lock b/Gemfile.lock
index 090ed4f..1119495 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,20 +2,20 @@ GEM
   remote: http://rubygems.org/
   specs:
     ffi (1.15.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     rack (2.2.4)
-    rack-protection (2.2.0)
+    rack-protection (2.2.3)
       rack
     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)
     sys-filesystem (1.4.1)
       ffi (~> 1.1)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby