diff --git a/CHANGELOG.md b/CHANGELOG.md
index c73f05a8..c65e8038 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,5 @@
-Unreleased
-----------
+0.4.0
+-----
 - Added support for opening and closing auction orders
 - Factored out `time-util` crate
 
diff --git a/Cargo.toml b/Cargo.toml
index 9d4dc814..67611ab0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "apca"
-version = "0.3.1"
+version = "0.4.0"
 edition = "2018"
 authors = ["Daniel Mueller <deso@posteo.net>"]
 license = "GPL-3.0-or-later"