diff --git a/README.md b/README.md
index 3cd4b6e..9eab352 100644
--- a/README.md
+++ b/README.md
@@ -87,6 +87,8 @@ CII to UBL Converter for EN 16931 invoices
 
 # News and noteworthy
 
+* v2.1.1 - work in progress
+    * Tested output against EN 16931 rules v1.3.10 and v1.3.11 - no changes necessary
 * v2.1.0 - 2023-04-28
     * Updated to ph-ubl 8.0.1
     * Added support for converting to UBL 2.4