diff --git a/lib/generators/solidus/auth/install/install_generator.rb b/lib/generators/solidus/auth/install/install_generator.rb
index c6ef547e..a569bc6a 100644
--- a/lib/generators/solidus/auth/install/install_generator.rb
+++ b/lib/generators/solidus/auth/install/install_generator.rb
@@ -14,7 +14,7 @@ class InstallGenerator < Rails::Generators::Base
         source_root "#{__dir__}/templates"
 
         def generate_devise_key
-          template 'config/initializers/devise.rb', 'config/initializers/devise.rb', skip: true
+          template 'config/initializers/devise.rb.erb', 'config/initializers/devise.rb', skip: true
         end
 
         def add_migrations
diff --git a/lib/generators/solidus/auth/install/templates/config/initializers/devise.rb b/lib/generators/solidus/auth/install/templates/config/initializers/devise.rb
deleted file mode 100644
index ffe0f494..00000000
--- a/lib/generators/solidus/auth/install/templates/config/initializers/devise.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-# frozen_string_literal: true
-
-Devise.secret_key = SecureRandom.hex(50).inspect
diff --git a/lib/generators/solidus/auth/install/templates/config/initializers/devise.rb.erb b/lib/generators/solidus/auth/install/templates/config/initializers/devise.rb.erb
new file mode 100644
index 00000000..3e1a9b0d
--- /dev/null
+++ b/lib/generators/solidus/auth/install/templates/config/initializers/devise.rb.erb
@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+
+Devise.secret_key = '<%= SecureRandom.hex(64) %>'
+Devise.email_regexp = Spree::Config[:default_email_regexp]