diff --git a/CHANGELOG.md b/CHANGELOG.md
index c06becd..b57560d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## next
+## `v0.4.0` (2022-05-17)
 
 *   BREAKING: remove deprecated `retina::client::Session<Playing>::teardown` and
     `retina::client::Demuxed::teardown`; made private some items already
diff --git a/Cargo.lock b/Cargo.lock
index 3da10ff..9201289 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -910,7 +910,7 @@ checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
 
 [[package]]
 name = "retina"
-version = "0.4.0-alpha.0"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "base64",
diff --git a/Cargo.toml b/Cargo.toml
index 8fe0c41..96b9337 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "retina"
-version = "0.4.0-alpha.0"
+version = "0.4.0"
 authors = ["Scott Lamb <slamb@slamb.org>"]
 license = "MIT/Apache-2.0"
 edition = "2021"
diff --git a/README.md b/README.md
index 7307994..69f19aa 100644
--- a/README.md
+++ b/README.md
@@ -9,8 +9,7 @@ ONVIF RTSP/1.0 IP surveillance cameras, as needed by
 [Moonfire NVR](https://github.com/scottlamb/moonfire-nvr). Works around
 brokenness in cheap closed-source cameras.
 
-Status: In production use in Moonfire NVR. Many missing features. Some breaking
-changes needed to clean up APIs (see [#47](https://github.com/scottlamb/retina/issues/47).)
+Status: In production use in Moonfire NVR. Many missing features.
 
 Progress: