diff --git a/spree_mail_settings.gemspec b/spree_mail_settings.gemspec
index cd34359..82c33d3 100644
--- a/spree_mail_settings.gemspec
+++ b/spree_mail_settings.gemspec
@@ -24,7 +24,6 @@ Gem::Specification.new do |s|
 
   spree_version = '>= 3.1.0', '< 4.0'
   s.add_runtime_dependency 'spree_backend', spree_version
-  s.add_runtime_dependency 'spree_auth_devise', spree_version
 
   s.add_development_dependency 'capybara'
   s.add_development_dependency 'coffee-rails'