diff --git a/Gemfile b/Gemfile
index bb486a20ce42ea170c7ce53627b66f0c25bc9736..4fc28069eceae07e0fcfdd4d673e1e336172c5dc 100644
--- a/Gemfile
+++ b/Gemfile
@@ -84,7 +84,7 @@ gem 'net-ldap'
 # API
 gem 'grape', '~> 1.1.0'
 gem 'grape-entity', '~> 0.7.1'
-gem 'rack-cors', '~> 1.0.0', require: 'rack/cors'
+gem 'rack-cors', '~> 1.0.6', require: 'rack/cors'
 
 # GraphQL API
 gem 'graphql', '~> 1.9.11'