diff --git a/Gemfile.lock b/Gemfile.lock
index 42fca13..70402e1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,7 +20,7 @@ GEM
     ffi (1.14.2)
     interception (0.5)
     method_source (1.0.0)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     pry (0.14.0)
       coderay (~> 1.1)
@@ -31,26 +31,26 @@ GEM
     pry-stack_explorer (0.6.1)
       binding_of_caller (~> 1.0)
       pry (~> 0.13)
-    rack (2.2.3)
+    rack (2.2.4)
     rack-cache (1.12.1)
       rack (>= 0.4)
     rack-fiber_pool (0.9.3)
-    rack-protection (2.1.0)
+    rack-protection (2.2.3)
       rack
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rb-readline (0.5.5)
-    ruby2_keywords (0.0.4)
+    ruby2_keywords (0.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    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)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
@@ -63,7 +63,7 @@ GEM
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.10)
+    tilt (2.0.11)
     websocket (1.2.9)
     websocket-eventmachine-base (1.2.0)
       eventmachine (~> 1.0)