diff --git a/1.50-release-notes.md b/1.50-release-notes.md
index 6208c8a..316956a 100644
--- a/1.50-release-notes.md
+++ b/1.50-release-notes.md
@@ -1,3 +1,4 @@
 ## All platforms
 - update to Go 1.21.1.
-- `tailscale ping` now sends an ICMP Ping code of 0.
\ No newline at end of file
+- `tailscale ping` now sends an ICMP Ping code of 0.
+- UPnP falls back to a permanent lease if a time-limited lease fails, some servers only support permanent.