diff --git a/SECURITY.md b/SECURITY.md
index 64112aeee6..b5138a396a 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -9,6 +9,7 @@ currently being supported with security updates.
 
 | Version | Supported          |
 | ------- | ------------------ |
+| 5.3.x   | :white_check_mark: |
 | 5.2.x   | :white_check_mark: |
 | 5.1.x   | :white_check_mark: |
 | 5.0.x   | :white_check_mark: |