diff --git a/README.md b/README.md
index 8454cfa..32e4ee0 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ rake db:migrate
 - Create a mailer method for each email
   - Mailer objects need to inherit from `Effective::LiquidMailer`
   - Mailer methods and email template slugs need to match up
-  - Email headers will be automatically used from your model but may be overwritten in the mail method (from, subject, cc, and bcc)
+  - Email headers can be declared in the #mail method but can be overrided by the saved attributes on the Effective::EmailTemplate model.
 
 ```ruby
 # app/mailers/user_liquid_mailer.rb
diff --git a/lib/effective/liquid_mailer.rb b/lib/effective/liquid_mailer.rb
index ab84599..9af2ba8 100644
--- a/lib/effective/liquid_mailer.rb
+++ b/lib/effective/liquid_mailer.rb
@@ -4,7 +4,7 @@ def mail(headers = {}, &block)
       # this be dangerous and requires ruby 2.0+
       mail_method = caller_locations(1,1)[0].label
       email_template = EffectiveEmailTemplates.get(mail_method)
-      headers = email_template.mail_options.merge(headers)
+      headers = headers.merge(email_template.mail_options)
       super(headers, &block)
     end
   end