diff --git a/bin/server b/bin/server
index a6bba9d8..ea7ba2b4 100755
--- a/bin/server
+++ b/bin/server
@@ -31,6 +31,14 @@ const argv = optimist
         default: 10,
         describe: 'maximum number of tcp sockets each client is allowed to establish at one time (the tunnels)'
     })
+    .options('range', {
+        default: null,
+        describe: 'will bind incoming connections only on ports in range xxx:xxxx'
+    })
+    .options('jwt-shared-secret', {
+        default: null,
+        describe: 'JWT shared secret used to encode tokens'
+    })
     .argv;
 
 if (argv.help) {
@@ -42,6 +50,8 @@ const server = CreateServer({
     max_tcp_sockets: argv['max-sockets'],
     secure: argv.secure,
     domain: argv.domain,
+    range: argv.range,
+    jwt_shared_secret: argv['jwt-shared-secret']
 });
 
 server.listen(argv.port, argv.address, () => {
diff --git a/lib/Client.js b/lib/Client.js
index 369eb079..bca0c5ad 100644
--- a/lib/Client.js
+++ b/lib/Client.js
@@ -2,6 +2,7 @@ import http from 'http';
 import Debug from 'debug';
 import pump from 'pump';
 import EventEmitter from 'events';
+import jwt from 'jsonwebtoken';
 
 // A client encapsulates req/res handling using an agent
 //
@@ -13,6 +14,7 @@ class Client extends EventEmitter {
 
         const agent = this.agent = options.agent;
         const id = this.id = options.id;
+        this.securityToken = options.securityToken;
 
         this.debug = Debug(`lt:Client[${this.id}]`);
 
@@ -45,6 +47,21 @@ class Client extends EventEmitter {
         });
     }
 
+    isSecurityTokenEqual(securityToken) {
+        const decodeJWT = (token) => {
+            return jwt.decode(token.replace(/Bearer /, ''), {complete: false});
+        }
+        if (this.securityToken === null) {
+            return false;
+        }
+        try{
+           return decodeJWT(this.securityToken).name === decodeJWT(securityToken).name;
+        }catch(error){
+           this.debug('error with jwt %s %s', securityToken, error);
+           return false;
+        }
+    }
+
     stats() {
         return this.agent.stats();
     }
@@ -129,4 +146,4 @@ class Client extends EventEmitter {
     }
 }
 
-export default Client;
\ No newline at end of file
+export default Client;
diff --git a/lib/ClientManager.js b/lib/ClientManager.js
index e1a78386..53a32508 100644
--- a/lib/ClientManager.js
+++ b/lib/ClientManager.js
@@ -3,6 +3,7 @@ import Debug from 'debug';
 
 import Client from './Client';
 import TunnelAgent from './TunnelAgent';
+import PortManager from "./PortManager";
 
 // Manage sets of clients
 //
@@ -13,6 +14,7 @@ class ClientManager {
 
         // id -> client instance
         this.clients = new Map();
+        this.portManager = new PortManager({range: this.opt.range||null})
 
         // statistics
         this.stats = {
@@ -28,7 +30,7 @@ class ClientManager {
     // create a new tunnel with `id`
     // if the id is already used, a random id is assigned
     // if the tunnel could not be created, throws an error
-    async newClient(id) {
+    async newClient(id, securityToken) {
         const clients = this.clients;
         const stats = this.stats;
 
@@ -39,6 +41,7 @@ class ClientManager {
 
         const maxSockets = this.opt.max_tcp_sockets;
         const agent = new TunnelAgent({
+            portManager: this.portManager,
             clientId: id,
             maxSockets: 10,
         });
@@ -46,6 +49,7 @@ class ClientManager {
         const client = new Client({
             id,
             agent,
+            securityToken
         });
 
         // add to clients map immediately
@@ -79,6 +83,7 @@ class ClientManager {
         if (!client) {
             return;
         }
+        this.portManager.release(client.agent.port);
         --this.stats.tunnels;
         delete this.clients[id];
         client.close();
diff --git a/lib/ClientManager.test.js b/lib/ClientManager.test.js
index d85abe55..852be61a 100644
--- a/lib/ClientManager.test.js
+++ b/lib/ClientManager.test.js
@@ -11,22 +11,22 @@ describe('ClientManager', () => {
 
     it('should create a new client with random id', async () => {
         const manager = new ClientManager();
-        const client = await manager.newClient();
+        const client = await manager.newClient(null, null);
         assert(manager.hasClient(client.id));
         manager.removeClient(client.id);
     });
 
     it('should create a new client with id', async () => {
         const manager = new ClientManager();
-        const client = await manager.newClient('foobar');
+        const client = await manager.newClient('foobar', null);
         assert(manager.hasClient('foobar'));
         manager.removeClient('foobar');
     });
 
     it('should create a new client with random id if previous exists', async () => {
         const manager = new ClientManager();
-        const clientA = await manager.newClient('foobar');
-        const clientB = await manager.newClient('foobar');
+        const clientA = await manager.newClient('foobar', null);
+        const clientB = await manager.newClient('foobar', null);
         assert(clientA.id, 'foobar');
         assert(manager.hasClient(clientB.id));
         assert(clientB.id != clientA.id);
@@ -36,7 +36,7 @@ describe('ClientManager', () => {
 
     it('should remove client once it goes offline', async () => {
         const manager = new ClientManager();
-        const client = await manager.newClient('foobar');
+        const client = await manager.newClient('foobar', null);
 
         const socket = await new Promise((resolve) => {
             const netClient = net.createConnection({ port: client.port }, () => {
@@ -57,8 +57,8 @@ describe('ClientManager', () => {
 
     it('should remove correct client once it goes offline', async () => {
         const manager = new ClientManager();
-        const clientFoo = await manager.newClient('foo');
-        const clientBar = await manager.newClient('bar');
+        const clientFoo = await manager.newClient('foo', null);
+        const clientBar = await manager.newClient('bar', null);
 
         const socket = await new Promise((resolve) => {
             const netClient = net.createConnection({ port: clientFoo.port }, () => {
@@ -80,7 +80,7 @@ describe('ClientManager', () => {
 
     it('should remove clients if they do not connect within 5 seconds', async () => {
         const manager = new ClientManager();
-        const clientFoo = await manager.newClient('foo');
+        const clientFoo = await manager.newClient('foo', null);
         assert(manager.hasClient('foo'));
 
         // wait past grace period (1s)
diff --git a/lib/PortManager.js b/lib/PortManager.js
new file mode 100644
index 00000000..cffc4ac8
--- /dev/null
+++ b/lib/PortManager.js
@@ -0,0 +1,60 @@
+import Debug from 'debug';
+
+class PortManager {
+  constructor(opt) {
+    this.debug = Debug('lt:PortManager');
+    this.range = opt.range || null;
+    this.first = null;
+    this.last = null;
+    this.pool = {};
+    this.initializePool();
+  }
+
+  initializePool() {
+    if (this.range === null) {
+      return;
+    }
+
+    if (!/^[0-9]+:[0-9]+$/.test(this.range)) {
+      throw new Error('Bad range expression: ' + this.range);
+    }
+
+    [this.first, this.last] = this.range.split(':').map((port) => parseInt(port));
+
+    if (this.first > this.last) {
+      throw new Error('Bad range expression min > max: ' + this.range);
+    }
+
+    for (let port = this.first; port <= this.last; port++) {
+      this.pool['_' + port] = null;
+    }
+    this.debug = Debug('lt:PortManager');
+    this.debug('Pool initialized ' + JSON.stringify(this.pool));
+  }
+
+  release(port) {
+    if (this.range === null) {
+      return;
+    }
+    this.debug('Release port ' + port);
+    this.pool['_' + port] = null;
+  }
+
+  getNextAvailable(clientId) {
+    if (this.range === null) {
+      return null;
+    }
+
+    for (let port = this.first; port <= this.last; port++) {
+      if (this.pool['_' + port] === null) {
+        this.pool['_' + port] = clientId;
+        this.debug('Port found ' + port);
+        return port;
+      }
+    }
+    this.debug('No more ports available ');
+    throw new Error('No more ports available in range ' + this.range);
+  }
+}
+
+export default PortManager;
diff --git a/lib/PortManager.test.js b/lib/PortManager.test.js
new file mode 100644
index 00000000..eb403e13
--- /dev/null
+++ b/lib/PortManager.test.js
@@ -0,0 +1,51 @@
+import assert from 'assert';
+
+import PortManager from './PortManager';
+
+describe('PortManager', () => {
+    it('should construct with no range', () => {
+      const portManager = new PortManager({});
+      assert.equal(portManager.range, null);
+      assert.equal(portManager.first, null);
+      assert.equal(portManager.last, null);
+    });
+
+    it('should construct with range', () => {
+      const portManager = new PortManager({range: '10:20'});
+      assert.equal(portManager.range, '10:20');
+      assert.equal(portManager.first, 10);
+      assert.equal(portManager.last, 20);
+    });
+
+    it('should not construct with bad range expression', () => {
+      assert.throws(()=>{
+        new PortManager({range: 'a1020'});
+      }, /Bad range expression: a1020/)
+    });
+
+    it('should not construct with bad range max>min', () => {
+      assert.throws(()=>{
+        new PortManager({range: '20:10'});
+      }, /Bad range expression min > max: 20:10/)
+    });
+
+    it('should work has expected', async () => {
+      const portManager = new PortManager({range: '10:12'});
+      assert.equal(10,portManager.getNextAvailable('a'));
+      assert.equal(11,portManager.getNextAvailable('b'));
+      assert.equal(12,portManager.getNextAvailable('c'));
+
+      assert.throws(()=>{
+        portManager.getNextAvailable();
+      }, /No more ports available in range 10:12/)
+
+      portManager.release(11);
+      assert.equal(11,portManager.getNextAvailable('bb'));
+
+      portManager.release(10);
+      portManager.release(12);
+
+      assert.equal(10,portManager.getNextAvailable('cc'));
+      assert.equal(12,portManager.getNextAvailable('dd'));
+    });
+});
diff --git a/lib/TunnelAgent.js b/lib/TunnelAgent.js
index efc2231b..a953d726 100644
--- a/lib/TunnelAgent.js
+++ b/lib/TunnelAgent.js
@@ -20,6 +20,9 @@ class TunnelAgent extends Agent {
 
         // sockets we can hand out via createConnection
         this.availableSockets = [];
+        this.port = null;
+        this.clientId = options.clientId
+        this.portManager = options.portManager || null;
 
         // when a createConnection cannot return a socket, it goes into a queue
         // once a socket is available it is handed out to the next callback
@@ -63,13 +66,14 @@ class TunnelAgent extends Agent {
         });
 
         return new Promise((resolve) => {
-            server.listen(() => {
-                const port = server.address().port;
-                this.debug('tcp server listening on port: %d', port);
+            const port = this.portManager ? this.portManager.getNextAvailable(this.options.clientId) : null;
+            server.listen(port,() => {
+                this.port = server.address().port
+                this.debug('tcp server listening on port: %d (%s)', this.port, this.clientId);
 
                 resolve({
                     // port for lt client tcp connections
-                    port: port,
+                    port: this.port,
                 });
             });
         });
@@ -115,6 +119,9 @@ class TunnelAgent extends Agent {
         socket.once('error', (err) => {
             // we do not log these errors, sessions can drop from clients for many reasons
             // these are not actionable errors for our server
+            if(this.portManager){
+                this.portManager.release(this.port);
+            }
             socket.destroy();
         });
 
diff --git a/package.json b/package.json
index 0693b8dd..39b58f59 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
     "esm": "3.0.34",
     "human-readable-ids": "1.0.3",
     "koa": "2.5.1",
+    "koa-jwt": "4.0.0",
     "koa-router": "7.4.0",
     "localenv": "0.2.2",
     "optimist": "0.6.1",
@@ -29,6 +30,6 @@
   "scripts": {
     "test": "mocha --check-leaks --require esm './**/*.test.js'",
     "start": "./bin/server",
-    "dev": "node-dev bin/server --port 3000"
+    "dev": "node-dev bin/server --require esm --port 3000"
   }
 }
diff --git a/server.js b/server.js
index 21a4af69..b5fb32ef 100644
--- a/server.js
+++ b/server.js
@@ -5,11 +5,18 @@ import Debug from 'debug';
 import http from 'http';
 import { hri } from 'human-readable-ids';
 import Router from 'koa-router';
+import jwt from'koa-jwt';
 
 import ClientManager from './lib/ClientManager';
 
 const debug = Debug('localtunnel:server');
 
+function addJwtMiddleware(app, opt) {
+    app.use(jwt({
+        secret: opt.jwt_shared_secret
+    }));
+}
+
 export default function(opt) {
     opt = opt || {};
 
@@ -28,6 +35,10 @@ export default function(opt) {
     const app = new Koa();
     const router = new Router();
 
+    if (opt.jwt_shared_secret){
+        addJwtMiddleware(app, opt);
+    }
+
     router.get('/api/status', async (ctx, next) => {
         const stats = manager.stats;
         ctx.body = {
@@ -50,6 +61,44 @@ export default function(opt) {
         };
     });
 
+    router.get('/api/tunnels/:id/kill', async (ctx, next) => {
+        const clientId = ctx.params.id;
+        if (!opt.jwt_shared_secret){
+          debug('disconnecting client with id %s, error: jwt_shared_secret is not used', clientId);
+          ctx.throw(403, {
+            success: false,
+            message: 'jwt_shared_secret is not used'
+          });
+          return;
+        }
+
+        if (!manager.hasClient(clientId)) {
+          debug('disconnecting client with id %s, error: client is not connected', clientId);
+          ctx.throw(404, {
+            success: false,
+            message: `client with id ${clientId} is not connected`
+          });
+        }
+
+        const securityToken = ctx.request.headers.authorization;
+        if (!manager.getClient(clientId).isSecurityTokenEqual(securityToken)) {
+          debug('disconnecting client with id %s, error: securityToken is not equal ', clientId);
+          ctx.throw(403, {
+            success: false,
+            message: `client with id ${clientId} has not the same securityToken than ${securityToken}`
+          });
+        }
+
+        debug('disconnecting client with id %s', clientId);
+        manager.removeClient(clientId);
+
+      ctx.statusCode = 200;
+      ctx.body = {
+        success: true,
+        message: `client with id ${clientId} is disconected`
+      };
+    });
+
     app.use(router.routes());
     app.use(router.allowedMethods());
 
@@ -67,7 +116,7 @@ export default function(opt) {
         if (isNewClientRequest) {
             const reqId = hri.random();
             debug('making new client with id %s', reqId);
-            const info = await manager.newClient(reqId);
+            const info = await manager.newClient(reqId, opt.jwt_shared_secret ? ctx.request.headers.authorization : null);
 
             const url = schema + '://' + info.id + '.' + ctx.request.host;
             info.url = url;
@@ -105,7 +154,7 @@ export default function(opt) {
         }
 
         debug('making new client with id %s', reqId);
-        const info = await manager.newClient(reqId);
+        const info = await manager.newClient(reqId, opt.jwt_shared_secret ? ctx.request.headers.authorization : null);
 
         const url = schema + '://' + info.id + '.' + ctx.request.host;
         info.url = url;
diff --git a/server.test.js b/server.test.js
index 10bf8bcf..0d3bb028 100644
--- a/server.test.js
+++ b/server.test.js
@@ -1,8 +1,9 @@
 import request from 'supertest';
 import assert from 'assert';
-import { Server as WebSocketServer } from 'ws';
-import WebSocket from 'ws';
+import WebSocket, {Server as WebSocketServer} from 'ws';
 import net from 'net';
+import jwt from 'jsonwebtoken';
+
 
 import createServer from './server';
 
@@ -34,6 +35,30 @@ describe('Server', () => {
         assert.equal(res.body.message, 'Invalid subdomain. Subdomains must be lowercase and between 4 and 63 alphanumeric characters.');
     });
 
+    it('reject request without jwt if required', async () => {
+        const server = createServer({jwt_shared_secret: 'thekey'});
+        const res = await request(server).get('/subdomain');
+        assert.equal(res.status, 401);
+    });
+
+    it('reject request with invalid jwt if required', async () => {
+        const server = createServer({jwt_shared_secret: 'thekey'});
+        const jwtoken = jwt.sign({
+            foo: 'bar'
+        }, 'thebadkey');
+        const res = await request(server).get('/subdomain').set('Authorization', `Bearer ${jwtoken}`);
+        assert.equal(res.status, 401);
+    });
+
+    it('accept request with valid jwt if required', async () => {
+        const server = createServer({jwt_shared_secret: 'thekey'});
+        const jwtoken = jwt.sign({
+            foo: 'bar'
+        }, 'thekey');
+        const res = await request(server).get('/subdomain').set('Authorization', `Bearer ${jwtoken}`);
+        assert.equal(res.status, 200);
+    });
+
     it('should upgrade websocket requests', async () => {
         const hostname = 'websocket-test';
         const server = createServer({
@@ -106,4 +131,53 @@ describe('Server', () => {
 
         await new Promise(resolve => server.close(resolve));
     });
-});
\ No newline at end of file
+
+    it('should not support the /api/tunnels/:id/kill endpoint if jwt authorization is not enable on server', async () => {
+        const server = createServer();
+        await new Promise(resolve => server.listen(resolve));
+
+        const res = await request(server).get('/api/tunnels/foobar-test/kill');
+        assert.equal(res.statusCode, 403);
+        assert.equal(res.text, 'jwt_shared_secret is not used');
+
+        await new Promise(resolve => server.close(resolve));
+    });
+
+    it('should throw error when calling /api/tunnels/:id/kill endpoint if id does not exists', async () => {
+        const server = createServer({jwt_shared_secret: 'thekey'});
+        await new Promise(resolve => server.listen(resolve));
+
+        {
+          const jwtoken = jwt.sign({
+            name: 'bar'
+          }, 'thekey');
+          await request(server).get('/foobar-test').set('Authorization', `Bearer ${jwtoken}`);
+          // no such tunnel yet
+          const res = await request(server).get('/api/tunnels/foobar-test2/kill').set('Authorization', `Bearer ${jwtoken}`);
+          assert.equal(res.statusCode, 404);
+          assert.equal(res.text, 'client with id foobar-test2 is not connected');
+        }
+
+        await new Promise(resolve => server.close(resolve));
+    });
+
+    it('should disconnect client when calling /api/tunnels/:id/kill endpoint', async () => {
+        const server = createServer({jwt_shared_secret: 'thekey'});
+        await new Promise(resolve => server.listen(resolve));
+
+        {
+          const jwtoken = jwt.sign({
+            name: 'bar'
+          }, 'thekey');
+          await request(server).get('/foobar-test').set('Authorization', `Bearer ${jwtoken}`);
+
+          const res = await request(server).get('/api/tunnels/foobar-test/kill').set('Authorization', `Bearer ${jwtoken}`);
+          assert.equal(res.statusCode, 200);
+          assert.equal(res.text, '{"success":true,"message":"client with id foobar-test is disconected"}');
+          const statusResult = await request(server).get('/api/tunnels/foobar-test/status').set('Authorization', `Bearer ${jwtoken}`);
+          assert.equal(statusResult.text, 'Not Found');
+        }
+
+        await new Promise(resolve => server.close(resolve));
+    });
+});
diff --git a/yarn.lock b/yarn.lock
index 9ad744bf..b54472e2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9,6 +9,14 @@ accepts@^1.2.2:
     mime-types "~2.1.18"
     negotiator "0.6.1"
 
+aggregate-error@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/aggregate-error/-/aggregate-error-3.1.0.tgz#92670ff50f5359bdb7a3e0d40d0ec30c5737687a"
+  integrity sha512-4I7Td01quW/RpocfNayFdFVk1qSuoh0E7JrbRJ16nH01HhKFQ88INq9Sd+nd72zqRySlr9BmDA8xlEJ6vJMrYA==
+  dependencies:
+    clean-stack "^2.0.0"
+    indent-string "^4.0.0"
+
 ansi-regex@^2.0.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-2.1.1.tgz#c3b33ab5ee360d86e0e628f0468ae7ef27d654df"
@@ -58,6 +66,11 @@ browser-stdout@1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/browser-stdout/-/browser-stdout-1.3.1.tgz#baa559ee14ced73452229bad7326467c61fabd60"
 
+buffer-equal-constant-time@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz#f8e71132f7ffe6e01a5c9697a4c6f3e48d5cc819"
+  integrity sha1-+OcRMvf/5uAaXJaXpMbz5I1cyBk=
+
 builtin-modules@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-1.1.1.tgz#270f076c5a72c02f5b65a47df94c5fe3a278892f"
@@ -90,6 +103,11 @@ chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
+clean-stack@^2.0.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/clean-stack/-/clean-stack-2.2.0.tgz#ee8472dbb129e727b31e8a10a427dee9dfe4008b"
+  integrity sha512-4diC9HaTE+KRAMWhDhrGOECgWZxoevMc5TlkObMqNSsVU62PYzXZ/SMTjzyGAFF1YusgxGcSWTEXBhp0CPwQ1A==
+
 cli-table@^0.3.1:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/cli-table/-/cli-table-0.3.1.tgz#f53b05266a8b1a0b934b3d0821e6e2dc5914ae23"
@@ -213,6 +231,13 @@ dynamic-dedupe@^0.2.0:
   dependencies:
     xtend "~2.0.6"
 
+ecdsa-sig-formatter@1.0.11:
+  version "1.0.11"
+  resolved "https://registry.yarnpkg.com/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz#ae0f0fa2d85045ef14a817daa3ce9acd0489e5bf"
+  integrity sha512-nagl3RYrbNv6kQkeJIpt6NJZy8twLB/2vtz6yN9Z4vRKHN4/QZJIEbqohALSgwKdnksuY3k5Addp5lg8sVoVcQ==
+  dependencies:
+    safe-buffer "^5.0.1"
+
 ee-first@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
@@ -369,6 +394,11 @@ indent-string@^2.1.0:
   dependencies:
     repeating "^2.0.0"
 
+indent-string@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/indent-string/-/indent-string-4.0.0.tgz#624f8f4497d619b2d9768531d58f4122854d7251"
+  integrity sha512-EdDDZu4A2OyIK7Lr/2zG+w5jmbuk1DVBnEwREQvBzspBJkCEbRa8GxU1lghYcaGJCnRWibjDXlq779X1/y5xwg==
+
 indexof@~0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/indexof/-/indexof-0.0.1.tgz#82dc336d232b9062179d05ab3293a66059fd435d"
@@ -428,6 +458,39 @@ isexe@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
 
+jsonwebtoken@^8.5.1:
+  version "8.5.1"
+  resolved "https://registry.yarnpkg.com/jsonwebtoken/-/jsonwebtoken-8.5.1.tgz#00e71e0b8df54c2121a1f26137df2280673bcc0d"
+  integrity sha512-XjwVfRS6jTMsqYs0EsuJ4LGxXV14zQybNd4L2r0UvbVnSF9Af8x7p5MzbJ90Ioz/9TI41/hTCvznF/loiSzn8w==
+  dependencies:
+    jws "^3.2.2"
+    lodash.includes "^4.3.0"
+    lodash.isboolean "^3.0.3"
+    lodash.isinteger "^4.0.4"
+    lodash.isnumber "^3.0.3"
+    lodash.isplainobject "^4.0.6"
+    lodash.isstring "^4.0.1"
+    lodash.once "^4.0.0"
+    ms "^2.1.1"
+    semver "^5.6.0"
+
+jwa@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/jwa/-/jwa-1.4.1.tgz#743c32985cb9e98655530d53641b66c8645b039a"
+  integrity sha512-qiLX/xhEEFKUAJ6FiBMbes3w9ATzyk5W7Hvzpa/SLYdxNtng+gcurvrI7TbACjIXlsJyr05/S1oUhZrc63evQA==
+  dependencies:
+    buffer-equal-constant-time "1.0.1"
+    ecdsa-sig-formatter "1.0.11"
+    safe-buffer "^5.0.1"
+
+jws@^3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/jws/-/jws-3.2.2.tgz#001099f3639468c9414000e99995fa52fb478304"
+  integrity sha512-YHlZCB6lMTllWDtSPHz/ZXTsi8S00usEV6v1tjq8tOUZzw7DpSDWVXjXDre6ed1w/pd495ODpHZYSdkRTsa0HA==
+  dependencies:
+    jwa "^1.4.1"
+    safe-buffer "^5.0.1"
+
 keygrip@~1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/keygrip/-/keygrip-1.0.2.tgz#ad3297c557069dea8bcfe7a4fa491b75c5ddeb91"
@@ -457,6 +520,15 @@ koa-is-json@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/koa-is-json/-/koa-is-json-1.0.0.tgz#273c07edcdcb8df6a2c1ab7d59ee76491451ec14"
 
+koa-jwt@4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/koa-jwt/-/koa-jwt-4.0.0.tgz#4cac70cde5e225bc961a266303d4b6e873cba9bc"
+  integrity sha512-n56AG98tWQDtvVZwtVFKuPn1pGPOvtkKFEotSPRsdqKmZJqRdppDRD0toiiK7kefMLnVBzFbocaPyaI5WK/iyQ==
+  dependencies:
+    jsonwebtoken "^8.5.1"
+    koa-unless "^1.0.7"
+    p-any "^2.1.0"
+
 koa-router@7.4.0:
   version "7.4.0"
   resolved "https://registry.yarnpkg.com/koa-router/-/koa-router-7.4.0.tgz#aee1f7adc02d5cb31d7d67465c9eacc825e8c5e0"
@@ -468,6 +540,11 @@ koa-router@7.4.0:
     path-to-regexp "^1.1.1"
     urijs "^1.19.0"
 
+koa-unless@^1.0.7:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/koa-unless/-/koa-unless-1.0.7.tgz#b9df375e2b4da3043918d48622520c2c0b79f032"
+  integrity sha1-ud83XitNowQ5GNSGIlIMLAt58DI=
+
 koa@2.5.1:
   version "2.5.1"
   resolved "https://registry.yarnpkg.com/koa/-/koa-2.5.1.tgz#79f8b95f8d72d04fe9a58a8da5ebd6d341103f9c"
@@ -566,6 +643,11 @@ lodash.clonedeep@^3.0.0:
     lodash._baseclone "^3.0.0"
     lodash._bindcallback "^3.0.0"
 
+lodash.includes@^4.3.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/lodash.includes/-/lodash.includes-4.3.0.tgz#60bb98a87cb923c68ca1e51325483314849f553f"
+  integrity sha1-YLuYqHy5I8aMoeUTJUgzFISfVT8=
+
 lodash.isarguments@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/lodash.isarguments/-/lodash.isarguments-3.1.0.tgz#2f573d85c6a24289ff00663b491c1d338ff3458a"
@@ -574,6 +656,31 @@ lodash.isarray@^3.0.0:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/lodash.isarray/-/lodash.isarray-3.0.4.tgz#79e4eb88c36a8122af86f844aa9bcd851b5fbb55"
 
+lodash.isboolean@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/lodash.isboolean/-/lodash.isboolean-3.0.3.tgz#6c2e171db2a257cd96802fd43b01b20d5f5870f6"
+  integrity sha1-bC4XHbKiV82WgC/UOwGyDV9YcPY=
+
+lodash.isinteger@^4.0.4:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/lodash.isinteger/-/lodash.isinteger-4.0.4.tgz#619c0af3d03f8b04c31f5882840b77b11cd68343"
+  integrity sha1-YZwK89A/iwTDH1iChAt3sRzWg0M=
+
+lodash.isnumber@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/lodash.isnumber/-/lodash.isnumber-3.0.3.tgz#3ce76810c5928d03352301ac287317f11c0b1ffc"
+  integrity sha1-POdoEMWSjQM1IwGsKHMX8RwLH/w=
+
+lodash.isplainobject@^4.0.6:
+  version "4.0.6"
+  resolved "https://registry.yarnpkg.com/lodash.isplainobject/-/lodash.isplainobject-4.0.6.tgz#7c526a52d89b45c45cc690b88163be0497f550cb"
+  integrity sha1-fFJqUtibRcRcxpC4gWO+BJf1UMs=
+
+lodash.isstring@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/lodash.isstring/-/lodash.isstring-4.0.1.tgz#d527dfb5456eca7cc9bb95d5daeaf88ba54a5451"
+  integrity sha1-1SfftUVuynzJu5XV2ur4i6VKVFE=
+
 lodash.keys@^3.0.0:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/lodash.keys/-/lodash.keys-3.1.2.tgz#4dbc0472b156be50a0b286855d1bd0b0c656098a"
@@ -582,6 +689,11 @@ lodash.keys@^3.0.0:
     lodash.isarguments "^3.0.0"
     lodash.isarray "^3.0.0"
 
+lodash.once@^4.0.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/lodash.once/-/lodash.once-4.1.1.tgz#0dd3971213c7c56df880977d504c88fb471a97ac"
+  integrity sha1-DdOXEhPHxW34gJd9UEyI+0cal6w=
+
 lodash.toarray@^4.4.0:
   version "4.4.0"
   resolved "https://registry.yarnpkg.com/lodash.toarray/-/lodash.toarray-4.4.0.tgz#24c4bfcd6b2fba38bfd0594db1179d8e9b656561"
@@ -692,6 +804,11 @@ ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
 
+ms@^2.1.1:
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.3.tgz#574c8138ce1d2b5861f0b44579dbadd60c6615b2"
+  integrity sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==
+
 negotiator@0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
@@ -773,6 +890,28 @@ optimist@0.6.1:
     minimist "~0.0.1"
     wordwrap "~0.0.2"
 
+p-any@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/p-any/-/p-any-2.1.0.tgz#719489408e14f5f941a748f1e817f5c71cab35cb"
+  integrity sha512-JAERcaMBLYKMq+voYw36+x5Dgh47+/o7yuv2oQYuSSUml4YeqJEFznBrY2UeEkoSHqBua6hz518n/PsowTYLLg==
+  dependencies:
+    p-cancelable "^2.0.0"
+    p-some "^4.0.0"
+    type-fest "^0.3.0"
+
+p-cancelable@^2.0.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/p-cancelable/-/p-cancelable-2.1.1.tgz#aab7fbd416582fa32a3db49859c122487c5ed2cf"
+  integrity sha512-BZOr3nRQHOntUjTrH8+Lh54smKHoHyur8We1V8DSMVrl5A2malOOwuJRnKRDjSnkoeBh4at6BwEnb5I7Jl31wg==
+
+p-some@^4.0.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/p-some/-/p-some-4.1.0.tgz#28e73bc1e0d62db54c2ed513acd03acba30d5c04"
+  integrity sha512-MF/HIbq6GeBqTrTIl5OJubzkGU+qfFhAFi0gnTAK6rgEIJIknEiABHOTtQu4e6JiXjIwuMPMUFQzyHh5QjCl1g==
+  dependencies:
+    aggregate-error "^3.0.0"
+    p-cancelable "^2.0.0"
+
 parse-json@^2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-2.2.0.tgz#f480f40434ef80741f8469099f8dea18f55a4dc9"
@@ -896,6 +1035,11 @@ resolve@^1.0.0:
   dependencies:
     path-parse "^1.0.5"
 
+safe-buffer@^5.0.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+  integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
+
 safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
@@ -904,6 +1048,11 @@ safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.5.0.tgz#dc4bbc7a6ca9d916dee5d43516f0092b58f7b8ab"
 
+semver@^5.6.0:
+  version "5.7.1"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
+  integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
+
 setprototypeof@1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.1.0.tgz#d0bd85536887b6fe7c0d818cb962d9d91c54e656"
@@ -1012,6 +1161,11 @@ trim-newlines@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/trim-newlines/-/trim-newlines-1.0.0.tgz#5887966bb582a4503a41eb524f7d35011815a613"
 
+type-fest@^0.3.0:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/type-fest/-/type-fest-0.3.1.tgz#63d00d204e059474fe5e1b7c011112bbd1dc29e1"
+  integrity sha512-cUGJnCdr4STbePCgqNFbpVNCepa+kAVohJs1sLhxzdH+gnEoOd8VhbYa7pD3zZYGiURWM2xzEII3fQcRizDkYQ==
+
 type-is@^1.5.5:
   version "1.6.16"
   resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.16.tgz#f89ce341541c672b25ee7ae3c73dee3b2be50194"