diff --git a/Gemfile.lock b/Gemfile.lock
index 56e20b1..8b7c4a2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -118,7 +118,7 @@ GEM
     popper_js (1.14.5)
     public_suffix (4.0.1)
     puma (3.12.4)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)