diff --git a/SECURITY.md b/SECURITY.md
index fe8b683d6a..6d4258c52e 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -9,6 +9,7 @@ currently being supported with security updates.
 
 | Version | Supported          |
 | ------- | ------------------ |
+| 5.9.x   | :white_check_mark: |
 | 5.8.x   | :white_check_mark: |
 | 5.7.x   | :white_check_mark: |
 | 5.6.x   | :white_check_mark: |