diff --git a/package.json b/package.json
index 619d6d12bf..73d99a84b7 100644
--- a/package.json
+++ b/package.json
@@ -69,7 +69,6 @@
     "pnpm-file-reporter": "0.0.1",
     "pnpm-install-checks": "1.1.0",
     "pnpm-logger": "0.2.0",
-    "promisequence": "1.1.6",
     "proper-lockfile": "2.0.0",
     "rc": "1.1.7",
     "read-pkg": "2.0.0",
diff --git a/src/api/extendOptions.ts b/src/api/extendOptions.ts
index c2bd956e57..e23b6fc62d 100644
--- a/src/api/extendOptions.ts
+++ b/src/api/extendOptions.ts
@@ -28,6 +28,7 @@ const defaults = () => (<StrictPnpmOptions>{
   networkConcurrency: 16,
   fetchingConcurrency: 16,
   lockStaleDuration: 60 * 1000, // 1 minute
+  childConcurrency: 5,
 })
 
 export default (opts?: PnpmOptions): StrictPnpmOptions => {
diff --git a/src/api/install.ts b/src/api/install.ts
index 0a0e9d8661..bf81d03135 100644
--- a/src/api/install.ts
+++ b/src/api/install.ts
@@ -1,6 +1,5 @@
 import rimraf = require('rimraf-then')
 import path = require('path')
-import seq = require('promisequence')
 import RegClient = require('npm-registry-client')
 import logger from 'pnpm-logger'
 import cloneDeep = require('lodash.clonedeep')
@@ -143,8 +142,9 @@ async function installInContext (installType: string, packagesToInstall: Depende
 
   // postinstall hooks
   if (!(opts.ignoreScripts || !installCtx.installationSequence || !installCtx.installationSequence.length)) {
-    await seq(
-      installCtx.installationSequence.map(async pkgId => {
+    const limitChild = pLimit(opts.childConcurrency)
+    await Promise.all(
+      installCtx.installationSequence.map(pkgId => limitChild(async () => {
         try {
           await postInstall(installCtx.installs[pkgId].hardlinkedLocation, installLogger(pkgId))
         } catch (err) {
@@ -157,7 +157,7 @@ async function installInContext (installType: string, packagesToInstall: Depende
           }
           throw err
         }
-      })
+      }))
     )
   }
   if (!opts.ignoreScripts && ctx.pkg) {
diff --git a/src/types.ts b/src/types.ts
index 1d1c40214c..36615a7b06 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -23,6 +23,7 @@ export type PnpmOptions = {
   nodeVersion?: string,
   networkConcurrency?: number,
   fetchingConcurrency?: number,
+  childConcurrency?: number,
   lockStaleDuration?: number,
 
   // proxy
@@ -65,6 +66,7 @@ export type StrictPnpmOptions = {
   networkConcurrency: number,
   fetchingConcurrency: number,
   lockStaleDuration: number,
+  childConcurrency: number,
 
   // proxy
   proxy?: string,
diff --git a/typings/local.d.ts b/typings/local.d.ts
index 7896700823..1d4ca243dc 100644
--- a/typings/local.d.ts
+++ b/typings/local.d.ts
@@ -68,11 +68,6 @@ declare module 'os-homedir' {
   export = anything;
 }
 
-declare module 'promisequence' {
-  const anything: any;
-  export = anything;
-}
-
 declare module 'read-pkg-up' {
   const anything: any;
   export = anything;