diff --git a/README.md b/README.md
index 9434029..4bd96c4 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,9 @@
-[![GitHub release](https://img.shields.io/github/release/cybozu-go/kubeintrospection.svg?maxAge=60)][releases]
-[![CI](https://github.com/cybozu-go/kubeintrospection/actions/workflows/ci.yaml/badge.svg)](https://github.com/cybozu-go/kubeintrospection/actions/workflows/ci.yaml)
-[![PkgGoDev](https://pkg.go.dev/badge/github.com/cybozu-go/kubeintrospection?tab=overview)](https://pkg.go.dev/github.com/cybozu-go/kubeintrospection?tab=overview)
-[![Go Report Card](https://goreportcard.com/badge/github.com/cybozu-go/kubeintrospection)](https://goreportcard.com/report/github.com/cybozu-go/kubeintrospection)
+[![GitHub release](https://img.shields.io/github/release/cybozu-go/necoperf.svg?maxAge=60)][releases]
+[![CI](https://github.com/cybozu-go/necoperf/actions/workflows/ci.yaml/badge.svg)](https://github.com/cybozu-go/necoperf/actions/workflows/ci.yaml)
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/cybozu-go/necoperf?tab=overview)](https://pkg.go.dev/github.com/cybozu-go/necoperf?tab=overview)
+[![Go Report Card](https://goreportcard.com/badge/github.com/cybozu-go/necoperf)](https://goreportcard.com/report/github.com/cybozu-go/necoperf)
 
-kubeintropsection
+NecoPerf
 ============================
 
 **Project Status**: Initial development
@@ -12,4 +12,4 @@ kubeintropsection
 
 [docs](docs/) directory contains documents about designs and specifications.
 
-[releases]: https://github.com/cybozu-go/kubeintrospection/releases
+[releases]: https://github.com/cybozu-go/necoperf/releases
diff --git a/docs/README.md b/docs/README.md
index d0a8d02..3173f17 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -1,3 +1,3 @@
-# KubeIntrospection documentation
+# NecoPerf documentation
 
-KubeIntrospection provides the ability to easily retrieve profiles of containers running on Kubernetes.
+NecoPerf provides the ability to easily retrieve profiles of containers running on Kubernetes.
diff --git a/docs/SUMMARY.md b/docs/SUMMARY.md
index 4157b32..190cb60 100644
--- a/docs/SUMMARY.md
+++ b/docs/SUMMARY.md
@@ -1,6 +1,6 @@
 # Summary
 
-[KubeIntrospection](README.md)
+[NecoPerf](README.md)
 
 # User manual
 
diff --git a/docs/book.toml b/docs/book.toml
index 6b3af9a..c9a4a49 100644
--- a/docs/book.toml
+++ b/docs/book.toml
@@ -2,9 +2,9 @@
 language = "en"
 multilingual = false
 src = "."
-title = "KubeIntrospection Documentation"
+title = "NecoPerf Documentation"
 
 [output.html]
-git-repository-url = "https://github.com/cybozu-go/kubeintrospection"
-edit-url-template = "https://github.com/cybozu-go/kubeintrospection/edit/main/docs/{path}"
-site-url = "/kubeintrospection/"
+git-repository-url = "https://github.com/cybozu-go/necoperf"
+edit-url-template = "https://github.com/cybozu-go/necoperf/edit/main/docs/{path}"
+site-url = "/necoperf/"