diff --git a/Gemfile.lock b/Gemfile.lock
index 3789545..7fe9425 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -137,7 +137,7 @@ GEM
     pg (0.21.0)
     public_suffix (3.1.0)
     puma (3.12.1)
-    rack (2.0.7)
+    rack (2.2.3)
     rack-pjax (1.1.0)
       nokogiri (~> 1.5)
       rack (>= 1.1)