diff --git a/README.md b/README.md
index 481e815f..5855a84f 100755
--- a/README.md
+++ b/README.md
@@ -43,6 +43,16 @@ Canyon is a JavaScript code coverage collection platform. We address the difficu
 
 <img src="./screenshots/wechat7.png" style="width: 200px"/>
 
+## Developing
+
+Follow our [self-hosting documentation](https://docs.canyonjs.org/zh/documentation/self-host/community-edition/prerequisites) to get started with the development environment.
+
+## Contributing
+
+Please contribute using [GitHub Flow](https://guides.github.com/introduction/flow). Create a branch, add commits, and [open a pull request](https://github.com/canyon-project/canyon/compare).
+
+Please read [`CONTRIBUTING`](CONTRIBUTING.md) for details on our [`CODE OF CONDUCT`](CODE_OF_CONDUCT.md), and the process for submitting pull requests to us.
+
 
 ## Contribution
 
diff --git a/packages/canyon-data/src/coverage/index.ts b/packages/canyon-data/src/coverage/index.ts
index d6541aa2..29bbcdca 100755
--- a/packages/canyon-data/src/coverage/index.ts
+++ b/packages/canyon-data/src/coverage/index.ts
@@ -1,4 +1,4 @@
-// import libCoverage, {CoverageMapData} from "istanbul-lib-coverage";
+import libCoverage, {CoverageMapData} from "istanbul-lib-coverage";
 // import {formatCoverageData} from "../utils/formatCoverageData.ts";
 /**
  * 合并两个覆盖率数据