diff --git a/README.md b/README.md
index 550a530..0a65dc0 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ The OICP protocol, created in 2012, now connects more than 300 companies in 26 c
 * [OICP 2.2](https://github.com/hubject/oicp/releases/tag/v2.2) - (All new implementations need to be based on OICP 2.3)
 * [OICP 2.1](https://github.com/hubject/oicp/releases/tag/v2.1) - (All new implementations need to be based on OICP 2.3)
 
+> **IMPORTANT**: From July 1st 2021 **OICP 2.1** will not be supported by Hubject 
 
 ## License
 [![CC BY-SA 4.0][cc-by-sa-shield]][cc-by-sa]