diff --git a/Gemfile.lock b/Gemfile.lock
index e765892..2900fd6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -369,7 +369,7 @@ GEM
     popper_js (1.14.5)
     public_suffix (4.0.1)
     puma (3.12.2)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-cors (1.0.5)
       rack (>= 1.6.0)
     rack-pjax (1.1.0)