diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d22d3a..d6583b4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## v0.4.0 (2023-10-31)
 
 * Added `ReadableStream::from(async_iterable)` and `try_from(async_iterable)`. ([#23](https://github.com/MattiasBuelens/wasm-streams/pull/23))
 * Stop calling `byobRequest.respond(0)` on cancel ([#16](https://github.com/MattiasBuelens/wasm-streams/pull/16))
diff --git a/Cargo.toml b/Cargo.toml
index fd49bb2..8d78e75 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "wasm-streams"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Mattias Buelens <mattias@buelens.com>"]
 edition = "2021"
 license = "MIT OR Apache-2.0"