diff --git a/SECURITY.md b/SECURITY.md
index b4949f05dc..3ac9264f11 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -6,8 +6,7 @@
 | ------- | ------------------ |
 | 5.18.x   | :white_check_mark: |
 | 5.17.x   | :white_check_mark: |
-| 5.16.x   | :white_check_mark: |
-| <= 5.15.x | :x:                |
+| <= 5.16.x | :x:                |
 
 ## Reporting a Vulnerability