diff --git a/Gemfile b/Gemfile
index a901a3c..d2924bd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,8 +1,8 @@
 source "https://rubygems.org"
 ruby "2.7.5"
 
-gem "sinatra", "~>2.0.2"
-gem "sinatra-contrib"
+gem "sinatra", "~> 4.0.0"
+gem "sinatra-contrib", ">= 4.0.0"
 gem "puma"
 gem "dalli"
 gem "rubyzip"