diff --git a/README.md b/README.md
index a8e2b6dd423ae0c9014319c8228a75b09f48ea84..4f59e69cd7033f6788397b1a6c504dc64833353d 100644
--- a/README.md
+++ b/README.md
@@ -42,8 +42,8 @@ PaddleHub以预训练模型应用为核心具备以下特点：
 
 ### 环境依赖
 
-* Python>=3.6 
-* PaddlePaddle>=1.6.1 
+* Python>=3.6
+* PaddlePaddle>=1.6.1
 * 操作系统: Windows/Mac/Linux
 
 ### 安装命令
diff --git a/docs/tutorial/serving.md b/docs/tutorial/serving.md
index a826b1103415a9b1f4a92c5cf4ee08c2a0b38517..cbaf2b7fa73591e148f8dffae3524fc5934260af 100644
--- a/docs/tutorial/serving.md
+++ b/docs/tutorial/serving.md
@@ -149,7 +149,7 @@ $ hub serving start -c serving_config.json
 
 </p>  
 
-这样我们就在8866端口部署了lac的在线分词服务。
+这样我们就在8866端口成功部署了lac的在线分词服务。
 *此处warning为Flask提示，不影响使用*
 
 ### Step2：访问lac预测接口
diff --git a/paddlehub/common/lock.py b/paddlehub/common/lock.py
index 6740eb409e73c26542351d349b94060dff63e521..770ce1179d5964d8a54ff5e5499334ddefb6bc02 100644
--- a/paddlehub/common/lock.py
+++ b/paddlehub/common/lock.py
@@ -8,8 +8,8 @@ class WinLock(object):
         pass
 
     def __init__(self):
-        self.LOCK_EX = ""
-        self.LOCK_UN = ""
+        self.LOCK_EX = "WIN_LOCK_EX"
+        self.LOCK_UN = "WIN_LOCK_UN"
 
 
 class Lock(object):