diff --git a/bench/package.json b/bench/package.json
deleted file mode 100644
index 31121283..00000000
--- a/bench/package.json
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-  "name": "frappe",
-  "description": "Default package.json for frappe apps",
-  "dependencies": {
-    "babel-core": "^6.24.1",
-    "babel-preset-babili": "0.0.12",
-    "babel-preset-es2015": "^6.24.1",
-    "babel-preset-es2016": "^6.24.1",
-    "babel-preset-es2017": "^6.24.1",
-    "chokidar": "^1.7.0",
-    "cookie": "^0.3.1",
-    "express": "^4.15.3",
-    "less": "^2.7.2",
-    "redis": "^2.7.1",
-    "socket.io": "^2.0.1",
-    "superagent": "^3.5.2"
-  }
-}
diff --git a/bench/patches/patches.txt b/bench/patches/patches.txt
index e979b0d6..f9adc549 100644
--- a/bench/patches/patches.txt
+++ b/bench/patches/patches.txt
@@ -3,4 +3,4 @@ bench.patches.v3.celery_to_rq
 bench.patches.v3.redis_bind_ip
 bench.patches.v4.update_node
 bench.patches.v4.update_socketio
-
+bench.patches.v4.install_yarn
diff --git a/bench/patches/v4/install_yarn.py b/bench/patches/v4/install_yarn.py
new file mode 100644
index 00000000..4ea0c23a
--- /dev/null
+++ b/bench/patches/v4/install_yarn.py
@@ -0,0 +1,4 @@
+import subprocess
+
+def execute(bench_path):
+	subprocess.check_output(['npm', 'install', '-g', 'yarn'])
\ No newline at end of file
diff --git a/bench/utils.py b/bench/utils.py
index aafa29cd..3ce3f264 100755
--- a/bench/utils.py
+++ b/bench/utils.py
@@ -144,7 +144,7 @@ def exec_cmd(cmd, cwd='.'):
 def which(executable, raise_err = False):
 	from distutils.spawn import find_executable
 	exec_ = find_executable(executable)
-	
+
 	if not exec_ and raise_err:
 		raise ValueError('{executable} not found.'.format(
 			executable = executable
@@ -430,34 +430,11 @@ def update_requirements(bench_path='.'):
 def update_npm_packages(bench_path='.'):
 	print('Updating node libraries...')
 	apps_dir = os.path.join(bench_path, 'apps')
-	package_json = {}
 
 	for app in os.listdir(apps_dir):
-		package_json_path = os.path.join(apps_dir, app, 'package.json')
+		app_path = os.path.join(apps_dir, app)
+		exec_cmd('yarn install', cwd=app_path)
 
-		if os.path.exists(package_json_path):
-			with open(package_json_path, "r") as f:
-				app_package_json = json.loads(f.read())
-				# package.json is usually a dict in a dict
-				for key, value in iteritems(app_package_json):
-					if not key in package_json:
-						package_json[key] = value
-					else:
-						if isinstance(value, dict):
-							package_json[key].update(value)
-						elif isinstance(value, list):
-							package_json[key].extend(value)
-						else:
-							package_json[key] = value
-
-	if package_json is {}:
-		with open(os.path.join(os.path.dirname(__file__), 'package.json'), 'r') as f:
-			package_json = json.loads(f.read())
-
-	with open(os.path.join(bench_path, 'package.json'), 'w') as f:
-		f.write(json.dumps(package_json, indent=1, sort_keys=True))
-
-	exec_cmd('npm install', cwd=bench_path)
 
 def install_requirements(pip, req_file):
 	if os.path.exists(req_file):
@@ -784,12 +761,11 @@ def run_playbook(playbook_name, extra_vars=None, tag=None):
 		print("Ansible is needed to run this command, please install it using 'pip install ansible'")
 		sys.exit(1)
 	args = ['ansible-playbook', '-c', 'local', playbook_name]
-	
+
 	if extra_vars:
 		args.extend(['-e', json.dumps(extra_vars)])
-	
+
 	if tag:
 		args.extend(['-t', tag])
-	
+
 	subprocess.check_call(args, cwd=os.path.join(os.path.dirname(bench.__path__[0]), 'playbooks'))
-	
\ No newline at end of file