diff --git a/USE_CASES.md b/USE_CASES.md
index d103bf22..08766fac 100644
--- a/USE_CASES.md
+++ b/USE_CASES.md
@@ -1100,6 +1100,8 @@ use SendGrid\Mail\Mail;
 use SendGrid\Mail\Personalization;
 use SendGrid\Mail\Subject;
 use SendGrid\Mail\To;
+use SendGrid\Mail\PlainTextContent;
+use SendGrid\Mail\HtmlContent;
 
 $from = new From("test@example.com", "Twilio Sendgrid");
 $to = new To(
@@ -1157,10 +1159,10 @@ $personalization1->addTo(new To(
         "Example User5 -name-"
 ));
 $personalization1->addFrom(new From(
-    "test5@example.com" => "Twilio"
+    "test5@example.com", "Twilio"
 ))
 $personalization1->setSubject(new Subject("Hello from Twilio!"));
-$mail->addPersonalization($personalization1);
+$email->addPersonalization($personalization1);
 
 $sendgrid = new \SendGrid(getenv('SENDGRID_API_KEY'));
 try {