diff --git a/cloudinary-image-management-and-manipulation-in-the-cloud-cdn/php/class-connect.php b/cloudinary-image-management-and-manipulation-in-the-cloud-cdn/php/class-connect.php
index 90b15c803..39bab567d 100644
--- a/cloudinary-image-management-and-manipulation-in-the-cloud-cdn/php/class-connect.php
+++ b/cloudinary-image-management-and-manipulation-in-the-cloud-cdn/php/class-connect.php
@@ -157,7 +157,7 @@ public function verify_connection( $data ) {
 		}
 
 		// Pattern match to ensure validity of the provided url
-		if ( ! preg_match( '~^(?:CLOUDINARY_URL=)?cloudinary://[0-9]+:[A-Za-z_0-9]+@[A-Za-z]+~', $data['cloudinary_url'] ) ) {
+		if ( ! preg_match( '~^(?:CLOUDINARY_URL=)?cloudinary://[0-9]+:[A-Za-z_\-0-9]+@[A-Za-z]+~', $data['cloudinary_url'] ) ) {
 			add_settings_error(
 				'cloudinary_connect',
 				'format_mismatch',