diff --git a/Gemfile.lock b/Gemfile.lock
index b1f5ac4..0b31e95 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     maxminddb (0.1.22)
     multi_json (1.14.1)
     mustermann (1.0.3)
-    rack (2.2.3)
+    rack (2.2.6.4)
     rack-protection (2.0.7)
       rack
     rack-test (1.1.0)