diff --git a/Gemfile.lock b/Gemfile.lock
index 0e1940a..3119a39 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,7 +44,7 @@ GEM
     nokogiri (1.10.7)
       mini_portile2 (~> 2.4.0)
     popper_js (1.14.5)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails-dom-testing (2.0.3)