diff --git a/package.json b/package.json
index 18fedb0f95e5a81026d4e03bae58b1f0886e4de3..2e5e42066c31f6d688f6299191c4ffa37c115ec5 100644
--- a/package.json
+++ b/package.json
@@ -99,7 +99,6 @@
     "@types/blessed": "^0.1.10",
     "@types/blue-tape": "^0.1.0",
     "@types/cuid": "^1.3.0",
-    "@types/express": "^4.11.1",
     "@types/fluent-ffmpeg": "^2.1.0",
     "@types/fs-extra": "^5.0.3",
     "@types/glob": "^5.0.0p",
@@ -121,7 +120,6 @@
     "check-node-version": "^3.0.0",
     "coveralls": "^3.0.0",
     "cross-env": "^5.1.6",
-    "express": "^4.16.3",
     "finis": "^0.4.1",
     "fluent-ffmpeg": "^2.1.0",
     "git-scripts": "git+https://github.com/nkzawa/git-scripts.git",
diff --git a/src/helper-functions/impure/get-port.spec.ts b/src/helper-functions/impure/get-port.spec.ts
old mode 100644
new mode 100755
index 73895dcd938a7f3a240640dc16c489693ccecc11..4a604303dad28a09c56a30b0ea6513045fa5cb0b
--- a/src/helper-functions/impure/get-port.spec.ts
+++ b/src/helper-functions/impure/get-port.spec.ts
@@ -21,7 +21,8 @@
 import test  from 'blue-tape'
 
 // import http      from 'http'
-import express   from 'express'
+// import express   from 'express'
+import net from 'net'
 
 import { getPort } from './get-port'
 
@@ -35,11 +36,14 @@ test('getPort() for an available socket port', async t => {
 
   while (ttl-- > 0) {
     try {
-      const app = express()
-      const server = app.listen(port)
+      const server = net.createServer(socket => {
+        console.log(socket)
+      })
+      server.listen(port, '127.0.0.1')
+      serverList.push(server)
+
       port = await getPort(PORT)
 
-      serverList.push(server)
     } catch (e) {
       t.fail('should not exception: ' + e.message + ', ' + e.stack)
     }