diff --git a/Gemfile.lock b/Gemfile.lock
index ff0249f..067cba3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,14 +11,14 @@ GEM
       eventmachine (>= 0.12.9)
     eventmachine (1.2.7)
     method_source (0.9.2)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (4.0.6)
-    rack (2.2.3)
-    rack-protection (2.2.0)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -36,10 +36,10 @@ GEM
       rspec-support (~> 3.8.0)
     rspec-support (3.8.2)
     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)
     sinatra-websocket (0.3.1)
       em-websocket (~> 0.3.6)
@@ -49,7 +49,7 @@ GEM
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby