diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e68bfcb..13d007e0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# v0.4.0 (unreleased)
+# v0.4.0 (2022-09-17)
 
 Target signald version: [v0.21.1](https://gitlab.com/signald/signald/-/releases/0.21.1)
 
diff --git a/mautrix_signal/__init__.py b/mautrix_signal/__init__.py
index 2078eb8a..bebde31e 100644
--- a/mautrix_signal/__init__.py
+++ b/mautrix_signal/__init__.py
@@ -1,2 +1,2 @@
-__version__ = "0.3.0"
+__version__ = "0.4.0"
 __author__ = "Tulir Asokan <tulir@maunium.net>"