diff --git a/doc/support.md b/doc/support.md
index e8ac13d32e5f..972d65cdf150 100644
--- a/doc/support.md
+++ b/doc/support.md
@@ -10,6 +10,7 @@ LXD maintains different release branches in parallel:
 <!-- Include end release -->
 
 The current LTS release is LXD 5.0, which is supported until June 2027 and gets frequent bugfix and security updates, but does not receive any feature additions.
+LXD 4.0 is supported until June 2025.
 
 Feature releases are pushed out about every month and contain new features as well as bugfixes.
 The normal support length for those releases is until the next release comes out.