diff --git a/CHANGELOG.md b/CHANGELOG.md
index 17d74594..1f2bdfed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,18 @@
+# 2018-08-10 version 3.1.0
+
+  * Improve documents (#687, #718)
+  * Add fuzzer support (#689)
+  * Fix msgpack::object union member access bug (#694)
+  * Improve cross platform configuration (#704)
+  * Fix out of range dereference bug of EXT (#705)
+  * Add timestamp support. std::chrono::system_clock::time_point is mapped to TIMESTAMP (#706)
+  * Add minimal timestamp support for C. The type `msgpack_timestamp` and the function `msgpack_object_to_timestamp()` are introduced (#707)
+  * Improve MSGPACK_DEFINE family name confliction probability (#710)
+  * Add no static-library build option (BUILD_SHARED_LIBS=ON) (#713, #717, #722)
+  * Add header only cmake target (#721)
+  * Add `std::byte` adaptor (#719)
+  * Remove some warnings (#720)
+
 # 2018-05-12 version 3.0.1
 
   * Add fuzz directory to release tar ball (#686)
diff --git a/README.md b/README.md
index 40efca4d..ea1ea53d 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 `msgpack` for C/C++
 ===================
 
-Version 3.0.1 [![Build Status](https://travis-ci.org/msgpack/msgpack-c.svg?branch=master)](https://travis-ci.org/msgpack/msgpack-c) [![Build status](https://ci.appveyor.com/api/projects/status/8kstcgt79qj123mw/branch/master?svg=true)](https://ci.appveyor.com/project/redboltz/msgpack-c/branch/master)
+Version 3.1.0 [![Build Status](https://travis-ci.org/msgpack/msgpack-c.svg?branch=master)](https://travis-ci.org/msgpack/msgpack-c) [![Build status](https://ci.appveyor.com/api/projects/status/8kstcgt79qj123mw/branch/master?svg=true)](https://ci.appveyor.com/project/redboltz/msgpack-c/branch/master)
 
 It's like JSON but smaller and faster.
 
diff --git a/appveyor.yml b/appveyor.yml
index 01505639..235b5bd9 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 3.0.1.{build}
+version: 3.1.0.{build}
 
 image:
 - Visual Studio 2015
diff --git a/include/msgpack/version_master.h b/include/msgpack/version_master.h
index 4491c321..fc29f07b 100644
--- a/include/msgpack/version_master.h
+++ b/include/msgpack/version_master.h
@@ -1,3 +1,3 @@
 #define MSGPACK_VERSION_MAJOR    3
-#define MSGPACK_VERSION_MINOR    0
-#define MSGPACK_VERSION_REVISION 1
+#define MSGPACK_VERSION_MINOR    1
+#define MSGPACK_VERSION_REVISION 0