diff --git a/backend/Gemfile b/backend/Gemfile
index 450d67b63..1de84d39e 100644
--- a/backend/Gemfile
+++ b/backend/Gemfile
@@ -23,7 +23,7 @@ gem 'puma', '~> 4.1'
 gem 'bootsnap', '>= 1.4.2', require: false
 
 # Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
-gem 'rack-cors'
+gem 'rack-cors', '>= 3.0.0'
 
 gem 'mysql2'