diff --git a/Gemfile b/Gemfile
index a901a3c..839000c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source "https://rubygems.org"
 ruby "2.7.5"
 
-gem "sinatra", "~>2.0.2"
+gem "sinatra", "~> 2.0.4"
 gem "sinatra-contrib"
 gem "puma"
 gem "dalli"