diff --git a/SECURITY.md b/SECURITY.md
index 004937f6..cb4f9e78 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -11,7 +11,8 @@ currently being supported with security updates.
 
 | Version  | Supported          | Notes                  |
 | -------- | ------------------ | ---------------------- |
-| 3.x      | :white_check_mark: |                        |
+| 4.x      | :white_check_mark: |                        |
+| 3.x      | :x:                | End-of-life as of November 2021 |
 | 2.x      | :x:                | End-of-life as of 2017 |
 
 ## Reporting a vulnerability