diff --git a/Gemfile b/Gemfile
index ea50f74b..39f421b5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -51,7 +51,7 @@ gem "omniauth-github"
 
 # Backgroud jobs
 gem "sidekiq"
-gem "sinatra"
+gem "sinatra", ">= 4.1.0"
 
 # Caching
 gem "dalli"