diff --git a/README.md b/README.md
index 0f52318..fcc0c77 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 [4]: https://github.com/zhaojh329/rtty/pulls
 [5]: https://img.shields.io/badge/Issues-welcome-brightgreen.svg?style=plastic
 [6]: https://github.com/zhaojh329/rtty/issues/new
-[7]: https://img.shields.io/badge/release-6.3.1-blue.svg?style=plastic
+[7]: https://img.shields.io/badge/release-6.4.0-blue.svg?style=plastic
 [8]: https://github.com/zhaojh329/rtty/releases
 [9]: https://travis-ci.org/zhaojh329/rtty.svg?branch=master
 [10]: https://travis-ci.org/zhaojh329/rtty
diff --git a/README_ZH.md b/README_ZH.md
index 2f76d74..d145f98 100644
--- a/README_ZH.md
+++ b/README_ZH.md
@@ -6,7 +6,7 @@
 [4]: https://github.com/zhaojh329/rtty/pulls
 [5]: https://img.shields.io/badge/Issues-welcome-brightgreen.svg?style=plastic
 [6]: https://github.com/zhaojh329/rtty/issues/new
-[7]: https://img.shields.io/badge/release-6.3.1-blue.svg?style=plastic
+[7]: https://img.shields.io/badge/release-6.4.0-blue.svg?style=plastic
 [8]: https://github.com/zhaojh329/rtty/releases
 [9]: https://travis-ci.org/zhaojh329/rtty.svg?branch=master
 [10]: https://travis-ci.org/zhaojh329/rtty
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index fb1003f..42a9a4b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -2,8 +2,8 @@ add_definitions(-O -Wall -Werror --std=gnu99 -D_GNU_SOURCE)
 
 # The version number.
 set(RTTY_VERSION_MAJOR 6)
-set(RTTY_VERSION_MINOR 3)
-set(RTTY_VERSION_PATCH 1)
+set(RTTY_VERSION_MINOR 4)
+set(RTTY_VERSION_PATCH 0)
 
 # Check the third party Libraries
 find_package(Libev REQUIRED)