diff --git a/Gemfile.lock b/Gemfile.lock
index 75ab01e..5f41217 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,22 +7,24 @@ GEM
       open4 (~> 1.3.4)
       rake
     minitest (5.12.2)
-    mustermann (1.0.3)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     open4 (1.3.4)
-    rack (2.0.7)
-    rack-protection (2.0.7)
+    rack (2.2.3)
+    rack-protection (2.1.0)
       rack
     rake (12.3.3)
-    sinatra (2.0.7)
+    ruby2_keywords (0.0.2)
+    sinatra (2.1.0)
       mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.7)
+      rack (~> 2.2)
+      rack-protection (= 2.1.0)
       tilt (~> 2.0)
     thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.9)
+    tilt (2.0.10)
 
 PLATFORMS
   ruby