diff --git a/Gemfile.lock b/Gemfile.lock
index a105dae..8193a3d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GEM
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     racc (1.6.2)
-    rack (2.2.6.4)
+    rack (2.2.8.1)
     rack-protection (2.2.3)
       rack
     ruby2_keywords (0.0.5)