diff --git a/SECURITY.md b/SECURITY.md
index 771d087a1..5001e4cd0 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -5,9 +5,11 @@
 | Version | Supported          |
 | ------- | ------------------ |
 | 2.4.x   | :white_check_mark: |
-| 2.3.x   | :white_check_mark: |
+| 2.3.x   | :x:                |
 | 16.04.x | :x:                |
 
+Security Onion 2.3 has reached End Of Life and is no longer supported.
+
 Security Onion 16.04 has reached End Of Life and is no longer supported.
 
 ## Reporting a Vulnerability