diff --git a/Gemfile.lock b/Gemfile.lock
index e4d6232..8dbec4f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,14 +6,14 @@ GEM
       tilt
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    rack (2.2.2)
-    rack-protection (2.0.8.1)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
-    ruby2_keywords (0.0.2)
-    sinatra (2.0.8.1)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
     temple (0.8.2)
     tilt (2.0.10)