diff --git a/packages/backend/src/server/NodeinfoServerService.ts b/packages/backend/src/server/NodeinfoServerService.ts
index 95cc69776..1a1a3bf5a 100644
--- a/packages/backend/src/server/NodeinfoServerService.ts
+++ b/packages/backend/src/server/NodeinfoServerService.ts
@@ -35,10 +35,10 @@ export class NodeinfoServerService {
 
 	@bindThis
 	public getLinks() {
-		return [/* (awaiting release) {
-			rel: 'http://nodeinfo.diaspora.software/ns/schema/2.1',
-			href: config.url + nodeinfo2_1path
-		}, */{
+		return [{
+				rel: 'http://nodeinfo.diaspora.software/ns/schema/2.1',
+				href: this.config.url + nodeinfo2_1path
+			}, {
 				rel: 'http://nodeinfo.diaspora.software/ns/schema/2.0',
 				href: this.config.url + nodeinfo2_0path,
 			}];
@@ -46,7 +46,7 @@ export class NodeinfoServerService {
 
 	@bindThis
 	public createServer(fastify: FastifyInstance, options: FastifyPluginOptions, done: (err?: Error) => void) {
-		const nodeinfo2 = async () => {
+		const nodeinfo2 = async (version: number) => {
 			const now = Date.now();
 
 			const notesChart = await this.notesChart.getChart('hour', 1, null);
@@ -73,11 +73,11 @@ export class NodeinfoServerService {
 
 			const basePolicies = { ...DEFAULT_POLICIES, ...meta.policies };
 
-			return {
+			// eslint-disable-next-line @typescript-eslint/no-explicit-any
+			const document: any = {
 				software: {
 					name: 'misskey',
 					version: this.config.version,
-					repository: meta.repositoryUrl,
 				},
 				protocols: ['activitypub'],
 				services: {
@@ -114,23 +114,36 @@ export class NodeinfoServerService {
 					themeColor: meta.themeColor ?? '#86b300',
 				},
 			};
+			if (version >= 21) {
+				document.software.repository = meta.repositoryUrl;
+				document.software.homepage = meta.repositoryUrl;
+			}
+			return document;
 		};
 
 		const cache = new MemorySingleCache<Awaited<ReturnType<typeof nodeinfo2>>>(1000 * 60 * 10);
 
 		fastify.get(nodeinfo2_1path, async (request, reply) => {
-			const base = await cache.fetch(() => nodeinfo2());
+			const base = await cache.fetch(() => nodeinfo2(21));
 
-			reply.header('Cache-Control', 'public, max-age=600');
+			reply
+				.type(
+					'application/json; profile="http://nodeinfo.diaspora.software/ns/schema/2.1#"',
+				)
+				.header('Cache-Control', 'public, max-age=600');
 			return { version: '2.1', ...base };
 		});
 
 		fastify.get(nodeinfo2_0path, async (request, reply) => {
-			const base = await cache.fetch(() => nodeinfo2());
+			const base = await cache.fetch(() => nodeinfo2(20));
 
 			delete (base as any).software.repository;
 
-			reply.header('Cache-Control', 'public, max-age=600');
+			reply
+				.type(
+					'application/json; profile="http://nodeinfo.diaspora.software/ns/schema/2.0#"',
+				)
+				.header('Cache-Control', 'public, max-age=600');
 			return { version: '2.0', ...base };
 		});