diff --git a/Gemfile.lock b/Gemfile.lock
index 051221c..16447cb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,19 +12,19 @@ GEM
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
-    rack (2.2.2)
-    rack-protection (2.0.8.1)
+    rack (2.2.3)
+    rack-protection (2.2.0)
       rack
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    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)
     tilt (2.0.10)
     unf (0.1.4)