diff --git a/website/content/en/security/unsupported.adoc b/website/content/en/security/unsupported.adoc
--- a/website/content/en/security/unsupported.adoc
+++ b/website/content/en/security/unsupported.adoc
@@ -40,11 +40,13 @@
 |releng/9.1 |9.1-RELEASE |Extended |December 30, 2012 |December 31, 2014
 |releng/9.2 |9.2-RELEASE |Normal |September 30, 2013 |December 31, 2014
 |releng/9.3 |9.3-RELEASE |Extended |July 16, 2014 |December 31, 2016
+|stable/10 |n/a |n/a |n/a |October 31, 2018
 |releng/10.0 |10.0-RELEASE |Normal |January 20, 2014 |February 28, 2015
 |releng/10.1 |10.1-RELEASE |Extended |November 14, 2014 |December 31, 2016
 |releng/10.2 |10.2-RELEASE |Normal |August 13, 2015 |December 31, 2016
 |releng/10.3 |10.3-RELEASE |Extended |April 4, 2016 |April 30, 2018
 |releng/10.4 |10.4-RELEASE |Normal |October 3, 2017 |October 31, 2018
+|stable/11 |n/a |n/a |n/a |September 30, 2021
 |releng/11.0 |11.0-RELEASE |n/a |October 10, 2016 |November 30, 2017
 |releng/11.1 |11.1-RELEASE |n/a |July 26, 2017 |September 30, 2018
 |releng/11.2 |11.2-RELEASE |n/a |June 28, 2018 |October 31, 2019