diff --git a/src/passage-reference.ts b/src/passage-reference.ts
index 3af4bf2..c012256 100644
--- a/src/passage-reference.ts
+++ b/src/passage-reference.ts
@@ -61,7 +61,7 @@ export default class PassageReference
 			.map((b) => `${b.name}|${b.aliases.join('|')}`)
 			.join('|');
 		regExpString +=
-			') ?(\\d{1,3}(?::\\d{1,3})?(?: ?\\- ?\\d{1,3}(?::\\d{1,3})?)?)((?: ?\\+[a-z]+(?::[a-z]+)?){0,2})$';
+			') ?(\\d{1,3}(?::\\d{1,3})?(?: ?\\- ?\\d{1,3}(?::\\d{1,3})?)?)((?: ?\\+\\w+(?::[a-z]+)?){0,2})$';
 
 		return new RegExp(regExpString, 'i');
 	}