diff --git a/Gemfile.lock b/Gemfile.lock
index e0b5cc8..6942b66 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -147,7 +147,7 @@ GEM
     popper_js (1.14.5)
     public_suffix (3.0.3)
     puma (3.12.0)
-    rack (2.0.6)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.2)