diff --git a/SECURITY.md b/SECURITY.md
index f9c1e57b1..1fa63ca35 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -1,5 +1,16 @@
 # Security Policy
 
+## Supported Versions
+
+Explanation on supported versions [here](https://github.com/certbot/certbot/wiki/Architectural-Decision-Records#-update-to-certbots-version-policy-and-end-of-life-support-on-previous-major-versions)
+
+| Major Version | Support Level |
+| ------- | ------------------ |
+| >= 4.0  | Full Support |
+| 3.x     | Discretionary Backports |
+| <=2.x   | None |
+
+
 ## Reporting a Vulnerability
 
 Security vulnerabilities can be reported using GitHub's [private vulnerability reporting tool](https://github.com/certbot/certbot/security/advisories/new).