diff --git a/Gemfile.lock b/Gemfile.lock
index 48a87b7..e155ba1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -153,7 +153,7 @@ GEM
     popper_js (1.14.5)
     public_suffix (4.0.1)
     puma (3.12.2)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-pjax (1.1.0)
       nokogiri (~> 1.5)
       rack (>= 1.1)