diff --git a/Gemfile.lock b/Gemfile.lock
index 92479d9..32b4eb9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -158,7 +158,7 @@ GEM
     popper_js (1.16.0)
     public_suffix (4.0.6)
     puma (3.12.6)
-    rack (2.2.3)
+    rack (2.2.4)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.3)