diff --git a/cognito-forms-oembed.php b/cognito-forms-oembed.php
index 5584e14..9082ac4 100644
--- a/cognito-forms-oembed.php
+++ b/cognito-forms-oembed.php
@@ -40,9 +40,9 @@
 
 if ( !class_exists('CognitoFormsOEmbed') ) {
   class CognitoFormsOEmbed {
-    public function __constructor() {
-      wp_oembed_add_provider( 'https://www.cognitoforms.com/*', 'https://www.cognitoforms.com/f/oembed/' );
+    public function __construct() {
+      wp_oembed_add_provider( '#https?://(www\.)?cognitoforms\.com/.*#i', 'https://www.cognitoforms.com/f/oembed/', true );
     }
   }
-  new CognitoFormsOEmbed
+  new CognitoFormsOEmbed;
 }
\ No newline at end of file