diff --git a/src/server/web/views/base.pug b/src/server/web/views/base.pug
index e61d29685..733a306d5 100644
--- a/src/server/web/views/base.pug
+++ b/src/server/web/views/base.pug
@@ -11,7 +11,7 @@ html
 		meta(name='application-name' content='Misskey')
 		meta(name='referrer' content='origin')
 		meta(name='theme-color' content='#105779')
-		meta(property='og:site_name' content= title || 'Misskey')
+		meta(property='og:site_name' content= instanceName || 'Misskey')
 		link(rel='icon' href= icon || '/favicon.ico')
 		link(rel='manifest' href='/manifest.json')