diff --git a/Gemfile.lock b/Gemfile.lock
index 5f95e21..0d03987 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,11 +7,11 @@ GEM
       rexml
     diff-lcs (1.4.4)
     hashdiff (1.0.1)
-    mustermann (1.1.1)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     public_suffix (4.0.6)
-    rack (2.2.3)
-    rack-protection (2.1.0)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -30,13 +30,13 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.10.0)
     rspec-support (3.10.2)
-    ruby2_keywords (0.0.4)
-    sinatra (2.1.0)
-      mustermann (~> 1.0)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
       rack (~> 2.2)
-      rack-protection (= 2.1.0)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
     webmock (3.13.0)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)