diff --git a/README.md b/README.md
index dda899f56616fdd62438d0a678178577a257399e..28f53b1a2c4e21320e34cdd3cd47610a816a91a0 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@ The documents in this repository comprise a set of digital security checklists f
 
 **These documents are designed for use in the U.S. domestic context and focused on common vulnerabilities. Use in other countries or to defend against highly aggressive and/or resourced attackers is not recommended without further threat analysis and tuning of content. [Contact us](https://iecology.org/contact) if you need support using these checklists in that way.**
 
+**This document is version 2.0 and was last updated in September 2017.**
 
 # Contents