1 files changed, 3 insertions, 2 deletions
diff --git a/src/server/api/endpoints/admin/federation/update-instance.ts b/src/server/api/endpoints/admin/federation/update-instance.ts
index d1abe95a5b..90ab7a3ec5 100644
--- a/src/server/api/endpoints/admin/federation/update-instance.ts
+++ b/src/server/api/endpoints/admin/federation/update-instance.ts
@@ -1,6 +1,7 @@
 import $ from 'cafy';
 import define from '../../../define';
 import { Instances } from '../../../../../models';
+import { toPuny } from '../../../../../misc/convert-host';
 
 export const meta = {
 	tags: ['admin'],
@@ -20,13 +21,13 @@ export const meta = {
 };
 
 export default define(meta, async (ps, me) => {
-	const instance = await Instances.findOne({ host: ps.host });
+	const instance = await Instances.findOne({ host: toPuny(ps.host) });
 
 	if (instance == null) {
 		throw new Error('instance not found');
 	}
 
-	Instances.update({ host: ps.host }, {
+	Instances.update({ host: toPuny(ps.host) }, {
 		isMarkedAsClosed: ps.isClosed
 	});
 });