diff --git a/Gemfile.lock b/Gemfile.lock
index 970b57f..4c6e3e4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -150,7 +150,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     puma (3.6.0)
-    rack (2.0.1)
+    rack (2.2.3)
     rack-pjax (1.0.0)
       nokogiri (~> 1.5)
       rack (>= 1.1)