diff --git a/Project.toml b/Project.toml
index 40a6ecde..5a19b925 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "BangBang"
 uuid = "198e06fe-97b7-11e9-32a5-e1d131e6ad66"
 authors = ["Takafumi Arakaki <aka.tkf@gmail.com>"]
-version = "0.3.11-DEV"
+version = "0.3.11"
 
 [deps]
 Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
diff --git a/README.md b/README.md
index 0ce3d29d..aae52800 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 [![Codecov](https://codecov.io/gh/tkf/BangBang.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/tkf/BangBang.jl)
 [![Coveralls](https://coveralls.io/repos/github/tkf/BangBang.jl/badge.svg?branch=master)](https://coveralls.io/github/tkf/BangBang.jl?branch=master)
 [![Aqua QA](https://img.shields.io/badge/Aqua.jl-%F0%9F%8C%A2-aqua.svg)](https://github.com/tkf/Aqua.jl)
-[![GitHub commits since tagged version](https://img.shields.io/github/commits-since/tkf/BangBang.jl/v0.3.10.svg?style=social&logo=github)](https://github.com/tkf/BangBang.jl)
+[![GitHub commits since tagged version](https://img.shields.io/github/commits-since/tkf/BangBang.jl/v0.3.11.svg?style=social&logo=github)](https://github.com/tkf/BangBang.jl)
 
 BangBang.jl implements functions whose name ends with `!!`.  Those
 functions provide a uniform interface for mutable and immutable data