diff --git a/Project.toml b/Project.toml
index 4c03ad6d..0ae7937d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Aqua"
 uuid = "4c88cf16-eb10-579e-8560-4a9242c79595"
 authors = ["Takafumi Arakaki <aka.tkf@gmail.com>"]
-version = "0.3.0"
+version = "0.4.0"
 
 [deps]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
diff --git a/README.md b/README.md
index d5a5bd46..b628f9cb 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 [![Build Status](https://travis-ci.com/tkf/Aqua.jl.svg?branch=master)](https://travis-ci.com/tkf/Aqua.jl)
 [![Codecov](https://codecov.io/gh/tkf/Aqua.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/tkf/Aqua.jl)
 [![Coveralls](https://coveralls.io/repos/github/tkf/Aqua.jl/badge.svg?branch=master)](https://coveralls.io/github/tkf/Aqua.jl?branch=master)
-[![GitHub commits since tagged version](https://img.shields.io/github/commits-since/tkf/Aqua.jl/v0.3.0.svg)](https://github.com/tkf/Aqua.jl)
+[![GitHub commits since tagged version](https://img.shields.io/github/commits-since/tkf/Aqua.jl/v0.4.0.svg)](https://github.com/tkf/Aqua.jl)
 [![Aqua QA](https://img.shields.io/badge/Aqua.jl-%F0%9F%8C%A2-aqua.svg)](https://github.com/tkf/Aqua.jl)
 
 Aqua.jl provides functions to run a few automatable checks for Julia packages: