diff --git a/sim/SIM-PROTOCOL.md b/sim/SIM-PROTOCOL.md
index 25476b0947..da81c7590f 100644
--- a/sim/SIM-PROTOCOL.md
+++ b/sim/SIM-PROTOCOL.md
@@ -63,7 +63,7 @@ The beginning of a battle will look something like this:
 
 `|gen|GENNUM`
 
-> Generation number, from 1 to 7. Stadium counts as its respective gens;
+> Generation number, from 1 to 9. Stadium counts as its respective gens;
 > Let's Go counts as 7, and modded formats count as whatever gen they were
 > based on.