diff --git a/Gemfile.lock b/Gemfile.lock
index 365ea1e..2e5754e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -93,7 +93,7 @@ GEM
     nokogiri (1.8.4)
       mini_portile2 (~> 2.3.0)
     puma (3.12.0)
-    rack (2.0.5)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.0)