diff --git a/Gemfile.lock b/Gemfile.lock
index d801d95..3387efa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,21 +26,23 @@ GEM
     json (1.8.6)
     method_source (0.9.2)
     minitest (5.11.3)
-    mustermann (1.0.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (2.0.6)
-    rack-protection (2.0.5)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rake (12.3.2)
     require_all (2.0.0)
+    ruby2_keywords (0.0.5)
     shotgun (0.9.2)
       rack (>= 1.0)
-    sinatra (2.0.5)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     sinatra-activerecord (2.0.13)
       activerecord (>= 3.2)
@@ -51,7 +53,7 @@ GEM
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
     thread_safe (0.3.6)
-    tilt (2.0.9)
+    tilt (2.0.11)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)