diff --git a/CHANGELOG-zh.md b/CHANGELOG-zh.md
index 03748273..2f80526d 100644
--- a/CHANGELOG-zh.md
+++ b/CHANGELOG-zh.md
@@ -1,7 +1,7 @@
 # 0.4.5 (unkown)
 ### 功能 / 优化
 - **交互式教程**. 引导用户了解 Crawlab 的主要功能.
-- **加入全局环境变量**. 可以设置全局环境变量，然后传入到所有爬虫程序中.
+- **加入全局环境变量**. 可以设置全局环境变量，然后传入到所有爬虫程序中. [#177](https://github.com/crawlab-team/crawlab/issues/177)
 - **用户管理优化**. 限制管理用户的权限. [#456](https://github.com/crawlab-team/crawlab/issues/456)
 - **设置页面优化**.
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2fad8ac0..b19bc419 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,7 @@
 # 0.4.5 (unkown)
 ### Features / Enhancement
 - **Interactive Tutorial**. Guide users through the main functionalities of Crawlab.
-- **Global Environment Variables**. Allow users to set global environment variables, which will be passed into all spider programs.
+- **Global Environment Variables**. Allow users to set global environment variables, which will be passed into all spider programs. [#177](https://github.com/crawlab-team/crawlab/issues/177)
 - **User Admin Optimization**. Restrict privilleges of admin users. [#456](https://github.com/crawlab-team/crawlab/issues/456)
 - **Setting Page Optimization**.