diff --git a/README.md b/README.md
index a84b80c..f8d039b 100644
--- a/README.md
+++ b/README.md
@@ -9,12 +9,9 @@
 goc is a comprehensive coverage testing system for The Go Programming Language, especially for some complex scenarios，like system testing code coverage collection and
 accurate testing.
 
+Enjoy, Have Fun!
 ![Demo](docs/images/intro.gif)
 
-> **Note:**
->
-> This readme and related documentation are Work in Progress.
-
 ## Installation
 To install goc tool, you need to install Go first (**version 1.11+ is required**), then:
 
@@ -57,7 +54,9 @@ Goc can collect code coverages at runtime for your long-run golang applications.
 - [ ] Optimize the performance costed by code coverage counters.
 
 ## Contributing
-We welcome all kinds of contribution, including bug reports, feature requests, documentation improvements, UI refinements, etc. 
+We welcome all kinds of contribution, including bug reports, feature requests, documentation improvements, UI refinements, etc.
+
+Thanks to all [contributors](https://github.com/qiniu/goc/graphs/contributors)!!
 
 ## License
 Goc is released under the Apache 2.0 license. See [LICENSE.txt](https://github.com/qiniu/goc/blob/master/LICENSE)
\ No newline at end of file
diff --git a/pkg/cover/instrument.go b/pkg/cover/instrument.go
index 1672480..d30a9fe 100644
--- a/pkg/cover/instrument.go
+++ b/pkg/cover/instrument.go
@@ -148,7 +148,6 @@ func registerHandlers() {
 		log.Fatalf("listen failed, err:%v", err)
 	}
 	
-	fmt.Printf("[goc] goc agent listened on: %s \n", host)
 	profileAddr := "http://" + host
 	if resp, err := registerSelf(profileAddr); err != nil {
 		log.Fatalf("register address %v failed, err: %v, response: %v", profileAddr, err, string(resp))