diff --git a/README.md b/README.md
index 9e65129..97e5ff1 100644
--- a/README.md
+++ b/README.md
@@ -73,7 +73,7 @@ We provide a vscode extension - [Goc Coverage](https://marketplace.visualstudio.
 - [x] Support code coverage collection for system testing.
 - [x] Support code coverage counters clear for the services under test at runtime.
 - [x] Support develop mode towards accurate testing.
-- [ ] Support code coverage diff based on Pull Request.
+- [x] Support code coverage diff based on Pull Request.
 - [ ] Optimize the performance costed by code coverage counters.
 
 ## Contributing
diff --git a/docs/images/wechat.png b/docs/images/wechat.png
index a1a70c8..6485ae2 100644
Binary files a/docs/images/wechat.png and b/docs/images/wechat.png differ
diff --git a/go.mod b/go.mod
index 7135ab5..ad4cbc3 100644
--- a/go.mod
+++ b/go.mod
@@ -20,6 +20,5 @@ require (
 	golang.org/x/net v0.0.0-20200625001655-4c5254603344
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 	golang.org/x/tools v0.0.0-20200730221956-1ac65761fe2c
-	k8s.io/kubernetes v1.13.0 // indirect
 	k8s.io/test-infra v0.0.0-20200511080351-8ac9dbfab055
 )