diff --git a/Gemfile.lock b/Gemfile.lock
index 5b75ace..2b8d6cb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,7 @@ GEM
     nio4r (2.5.9)
     puma (6.3.1)
       nio4r (~> 2.0)
-    rack (2.2.6.4)
+    rack (2.2.9)
     rack-protection (3.0.4)
       rack
     ruby2_keywords (0.0.5)