diff --git a/package.json b/package.json
index 2eee53d..11cbe1d 100644
--- a/package.json
+++ b/package.json
@@ -45,6 +45,7 @@
     "prismarine-registry": "^1.8.0"
   },
   "dependencies": {
+    "@types/node-rsa": "^1.1.4",
     "@types/readable-stream": "^4.0.0",
     "aes-js": "^3.1.2",
     "buffer-equal": "^1.0.0",
diff --git a/src/index.d.ts b/src/index.d.ts
index 4230852..e61d540 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -7,6 +7,7 @@ import { Agent } from 'http'
 import { Transform } from "readable-stream";
 import { BinaryLike, KeyObject } from 'crypto';
 import { Realm } from "prismarine-realms"
+import NodeRSA from 'node-rsa';
 
 type PromiseLike = Promise<void> | void
 
@@ -166,6 +167,7 @@ declare module 'minecraft-protocol' {
 		motd: string
 		motdMsg?: Object
 		favicon: string
+		serverKey: NodeRSA
 		close(): void
 		on(event: 'connection', handler: (client: ServerClient) => PromiseLike): this
 		on(event: 'error', listener: (error: Error) => PromiseLike): this
diff --git a/src/server/login.js b/src/server/login.js
index ad143d3..858b952 100644
--- a/src/server/login.js
+++ b/src/server/login.js
@@ -8,6 +8,11 @@ const { concat } = require('../transforms/binaryStream')
 const { mojangPublicKeyPem } = require('./constants')
 const debug = require('debug')('minecraft-protocol')
 
+/**
+ * @param {import('../index').Client} client
+ * @param {import('../index').Server} server
+ * @param {Object} options
+ */
 module.exports = function (client, server, options) {
   const mojangPubKey = crypto.createPublicKey(mojangPublicKeyPem)
   const raise = (translatableError) => client.end(translatableError, JSON.stringify({ translate: translatableError }))