diff --git a/Supported-Systems.md b/Supported-Systems.md
index ed5ca12..6aebc2b 100644
--- a/Supported-Systems.md
+++ b/Supported-Systems.md
@@ -29,6 +29,8 @@ From the IIsi service manual:
 
 ### PowerMacs
 
+You must be on version `v1.0-20210410` or later.
+
 It is recommended to use the BERG or external power to drive the BlueSCSI when using PowerPC machines. The TERMPOWER is not on the same 5v and may dip causing issues.
 
 # Samplers