diff --git a/app/builders/contact_builder.rb b/app/builders/contact_builder.rb
index ac24aca34..14f26aa82 100644
--- a/app/builders/contact_builder.rb
+++ b/app/builders/contact_builder.rb
@@ -33,7 +33,8 @@ class ContactBuilder
       phone_number: contact_attributes[:phone_number],
       email: contact_attributes[:email],
       identifier: contact_attributes[:identifier],
-      additional_attributes: contact_attributes[:additional_attributes]
+      additional_attributes: contact_attributes[:additional_attributes],
+      custom_attributes: contact_attributes[:custom_attributes]
     )
   end
 
diff --git a/spec/builders/contact_builder_spec.rb b/spec/builders/contact_builder_spec.rb
index 5687ce470..29df0da22 100644
--- a/spec/builders/contact_builder_spec.rb
+++ b/spec/builders/contact_builder_spec.rb
@@ -28,12 +28,14 @@ describe ::ContactBuilder do
         contact_attributes: {
           name: 'Contact',
           phone_number: '+1234567890',
-          email: 'testemail@example.com'
+          email: 'testemail@example.com',
+          custom_attributes: { test: 'test' }
         }
       ).perform
 
       expect(contact_inbox.contact.id).not_to eq(contact.id)
       expect(contact_inbox.contact.name).to eq('Contact')
+      expect(contact_inbox.contact.custom_attributes).to eq({ 'test' => 'test' })
       expect(contact_inbox.inbox_id).to eq(inbox.id)
     end