diff --git a/Gemfile.lock b/Gemfile.lock
index 9b6f7b1..608f196 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,24 +5,24 @@ GEM
     faye-websocket (0.11.0)
       eventmachine (>= 0.12.0)
       websocket-driver (>= 0.5.1)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.2)
     pg (1.2.2)
     puma (4.3.5)
       nio4r (~> 2.0)
-    rack (2.2.3)
-    rack-protection (2.0.8.1)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rake (13.0.1)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     sequel (5.28.0)
-    sinatra (2.0.8.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
     websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)