diff --git a/README.markdown b/README.markdown
index 6a06fdc..509dd03 100644
--- a/README.markdown
+++ b/README.markdown
@@ -29,7 +29,7 @@ Spec::Runner.configure do |config|
   config.include(SmsSpec::Matchers)
 end
 
-SmsSpec.driver = :twilio-ruby #this can be any available sms-spec driver
+SmsSpec.driver = :"twilio-ruby" #this can be any available sms-spec driver
 </pre>
 
 ## Cucumber