diff --git a/changelog.md b/changelog.md
index b61cc72..293ec2e 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,9 @@
+# 2022-04-20 - v0.4.0
+
+* Add minimal clustering logic.
+* Fix crash on unavailable HAProxy socket.
+* Fix invalid drbd backend state computation for haproxy.
+
 # 2022-04-20 - v0.3.0
 
 * Add Appsignal support.