diff --git a/README.md b/README.md
index 81f0ac5a..c7770282 100644
--- a/README.md
+++ b/README.md
@@ -378,6 +378,7 @@ with the terminal emulator itself. Foot implements the following OSCs:
 * `OSC 4` - change color palette
 * `OSC 7` - report CWD
 * `OSC 8` - hyperlink
+* `OSC 9` - desktop notification
 * `OSC 10` - change (default) foreground color
 * `OSC 11` - change (default) background color
 * `OSC 12` - change cursor color