diff --git a/Gemfile.lock b/Gemfile.lock
index 65ff65e..8b4e734 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -65,7 +65,7 @@ GEM
     ice_nine (0.11.2)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    rack (2.2.3.1)
+    rack (2.2.6.3)
     rack-protection (2.2.0)
       rack
     rake (13.0.1)