diff --git a/README-zh.md b/README-zh.md
index 4b662f23..0556532a 100644
--- a/README-zh.md
+++ b/README-zh.md
@@ -154,6 +154,10 @@ Docker部署的详情，请见[相关文档](https://tikazyq.github.io/crawlab-d
 
 ![](http://static-docs.crawlab.cn/schedule-v0.4.4.png)
 
+#### 语言安装
+
+![](http://static-docs.crawlab.cn/node-install-langs.png)
+
 #### 依赖安装
 
 ![](http://static-docs.crawlab.cn/node-install-dependencies.png)
diff --git a/README.md b/README.md
index 0ca2a772..8224cc77 100644
--- a/README.md
+++ b/README.md
@@ -152,6 +152,10 @@ For Docker Deployment details, please refer to [relevant documentation](https://
 
 ![](http://static-docs.crawlab.cn/schedule-v0.4.4.png)
 
+#### Language Installation
+
+![](http://static-docs.crawlab.cn/node-install-langs.png)
+
 #### Dependency Installation
 
 ![](http://static-docs.crawlab.cn/node-install-dependencies.png)
diff --git a/backend/conf/config.yml b/backend/conf/config.yml
index 1b724c42..8bcf24fb 100644
--- a/backend/conf/config.yml
+++ b/backend/conf/config.yml
@@ -35,14 +35,13 @@ spider:
   path: "/app/spiders"
 task:
   workers: 4
-rpc:
-  workers: 16
 other:
   tmppath: "/tmp"
 version: 0.4.7
 setting:
   allowRegister: "N"
   enableTutorial: "N"
+  runOnMaster: "Y"
 notification:
   mail:
     server: ''