diff --git a/Gemfile.lock b/Gemfile.lock
index 2f4bdab..116ae48 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,19 +8,21 @@ GEM
       thor (~> 0.18)
     json (2.3.0)
     minitest (5.11.3)
-    mustermann (1.0.3)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     rack (2.2.3)
-    rack-protection (2.0.4)
+    rack-protection (2.2.0)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    sinatra (2.0.4)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.4)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
     thor (0.20.3)
-    tilt (2.0.8)
+    tilt (2.0.10)
 
 PLATFORMS
   ruby