diff --git a/README.md b/README.md
index 4b0255d..412ddef 100644
--- a/README.md
+++ b/README.md
@@ -139,7 +139,7 @@ To do that:
 - Archer AX12 v1.0
 - Archer AX20 v1.0
 - Archer AX20 v3.0
-- Archer AX21 v1.20
+- Archer AX21 (v1.20, v3.0)
 - Archer AX23 v1.0
 - Archer AX50 v1.0
 - Archer AX53 v2