diff --git a/packages/backend/src/core/activitypub/ApRendererService.ts b/packages/backend/src/core/activitypub/ApRendererService.ts
index 49f9ebe3f..1891c341e 100644
--- a/packages/backend/src/core/activitypub/ApRendererService.ts
+++ b/packages/backend/src/core/activitypub/ApRendererService.ts
@@ -464,7 +464,7 @@ export class ApRendererService {
 		const attachment = profile.fields.map(field => ({
 			type: 'PropertyValue',
 			name: field.name,
-			value: /^https?:/.test(field.value)
+			value: (field.value.startsWith('http://') || field.value.startsWith('https://'))
 				? `<a href="${new URL(field.value).href}" rel="me nofollow noopener" target="_blank">${new URL(field.value).href}</a>`
 				: field.value,
 		}));