diff --git a/README.md b/README.md
index da32481..1e8d332 100644
--- a/README.md
+++ b/README.md
@@ -50,14 +50,15 @@ func main() {
 
 ## Want to mock API?
 
-go-zendesk has a [mock package](https://pkg.go.dev/github.com/nukosuke/go-zendesk/zendesk/mock) generated by [golang/mock](https://github.com/golang/mock).
+go-zendesk has a [mock package](https://pkg.go.dev/github.com/nukosuke/go-zendesk/zendesk/mock) generated by [uber-go/mock](https://github.com/uber-go/mock).
 You can simulate the response from Zendesk API with it.
 
 ## To regenerate the mock client
 
 `go generate ./...`
 
-## Zendesk [OBP(Offset Based Pagination) to CBP(Cursor Based Pagination) migration guide](CBPMigration.md)
+## Zendesk OBP(Offset Based Pagination) to CBP(Cursor Based Pagination) migration guide
+[CBPMigration](CBPMigration.md)
 
 ## Maintainer
 
diff --git a/zendesk/zendesk.go b/zendesk/zendesk.go
index 2892adf..d829ef7 100644
--- a/zendesk/zendesk.go
+++ b/zendesk/zendesk.go
@@ -18,7 +18,7 @@ const (
 )
 
 var defaultHeaders = map[string]string{
-	"User-Agent":   "nukosuke/go-zendesk",
+	"User-Agent":   "nukosuke/go-zendesk/0.18.0",
 	"Content-Type": "application/json",
 }