diff --git a/src/server/index.ts b/src/server/index.ts
index db41a1dcb5..28babeed68 100644
--- a/src/server/index.ts
+++ b/src/server/index.ts
@@ -53,6 +53,7 @@ function createServer() {
 		Object.keys(config.https).forEach(k => {
 			certs[k] = fs.readFileSync(config.https[k]);
 		});
+		certs['allowHTTP1'] = true
 		return http2.createSecureServer(certs, app.callback());
 	} else {
 		return http.createServer(app.callback());