diff --git a/src/api/api_document.py b/src/api/api_document.py
index 4c89fbc..059abb9 100644
--- a/src/api/api_document.py
+++ b/src/api/api_document.py
@@ -2,6 +2,7 @@ from flask import Blueprint, request
 from web_utils.get_arg import get_arg
 from web_utils.business_exception import BusinessException
 import os
+import time
 
 from data.document import Document
 
@@ -13,13 +14,18 @@ def build():
 	doc_name = get_arg('doc_name')
 	branch = get_arg('branch', 'master')
 	apikey = get_arg('apikey')
+	join = get_arg('join', 'false')
 	doc = Document(origin, doc_name, branch)
 	
 	if doc.get_api_key() != apikey:
 		raise BusinessException("Invalid API key")
 	
 	build_task = doc.build()
-	build_task.join()
+	
+	if join == 'true':
+		build_task.join()
+	else:
+		time.sleep(1)
 	
 	return build_task.get_output_str().replace('\n', '<br/>\n')