diff --git a/Gemfile.lock b/Gemfile.lock
index 8f6726b..ce38a01 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,11 +10,11 @@ GEM
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
     power_assert (1.2.0)
-    rack (2.2.3)
+    rack (2.2.6.4)
     rack-protection (2.2.0)
       rack
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
+    rack-test (2.1.0)
+      rack (>= 1.3)
     ruby2_keywords (0.0.5)
     sinatra (2.2.0)
       mustermann (~> 1.0)