diff --git a/app/models/light/user.rb b/app/models/light/user.rb
index 8309e65..1fb38b9 100644
--- a/app/models/light/user.rb
+++ b/app/models/light/user.rb
@@ -69,7 +69,8 @@ def self.add_users_from_worksheet(worksheet, column = 1)
     end
 
     def self.import(file, email='')
-      return {error: "Please select CSV file"} if (file.blank? or file.content_type != 'text/csv')
+      mime_types = ['application/vnd.ms-excel', 'text/csv']
+      return {error: "Please select CSV file"} unless (file.present? && mime_types.include?(file.content_type) )
       file = CSV.open(file.path, :row_sep => :auto, :col_sep => ",")
       rows = file.read
       header = rows.delete_at(0)
diff --git a/app/workers/light/import_worker.rb b/app/workers/light/import_worker.rb
index 3b3a522..0cc9137 100644
--- a/app/workers/light/import_worker.rb
+++ b/app/workers/light/import_worker.rb
@@ -16,8 +16,8 @@ def perform(rows, email_id, source = "Business Card")
                                     is_subscribed: false, sidekiq_status: Light::User::NEW_USER) if email.present? or name.present?
           csv << [email, row[0], user.errors.messages] if user.present? and user.errors.present?
         end
-        UserMailer.import_contacts_update(email_id, file_path).deliver
       end
+      UserMailer.delay_for(30.seconds).import_contacts_update(email_id, file_path)
     end
   end
 end