diff --git a/RELEASE.md b/RELEASE.md
index 139593d..04f3441 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -1,3 +1,21 @@
+# [Release 0.4.0](https://github.com/standy66/purerpc/compare/v0.3.2...v0.4.0) (2019-07-22)
+
+
+### Bug Fixes
+
+* speed improvements ([1cb3d46](https://github.com/standy66/purerpc/commit/1cb3d46))
+
+
+### Features
+
+* add state property to GRPCStream ([0019d8c](https://github.com/standy66/purerpc/commit/0019d8c))
+* answer PING frames ([c829901](https://github.com/standy66/purerpc/commit/c829901))
+* change MAX_CONCURRENT_STREAMS from 1000 to 65536 ([d2d461f](https://github.com/standy66/purerpc/commit/d2d461f))
+* decouple h2 and grpclib logic ([1f4e6b0](https://github.com/standy66/purerpc/commit/1f4e6b0))
+* support percent-encoded grpc-message header ([c6636f4](https://github.com/standy66/purerpc/commit/c6636f4))
+* change default max message length to 32 MB
+
+
 # [Release 0.3.2](https://github.com/standy66/purerpc/compare/v0.3.1...v0.3.2) (2019-02-15)
 
 
diff --git a/src/purerpc/_version.py b/src/purerpc/_version.py
index def9e10..13cfd0c 100644
--- a/src/purerpc/_version.py
+++ b/src/purerpc/_version.py
@@ -1,3 +1,3 @@
 # This file is imported from __init__.py and exec'd from setup.py
 
-__version__ = "0.3.2"
+__version__ = "0.4.0"