diff --git a/docs/qa.md b/docs/qa.md
index 608598a..f187fa7 100644
--- a/docs/qa.md
+++ b/docs/qa.md
@@ -131,7 +131,7 @@ check that the failure floor catches a mid-session model death.
 
 ---
 
-## Session 3: the interaction batch (a day, or three sittings)
+## Session 3: the interaction batch (a day, or five sittings)
 
 These need real use rather than a command, grouped by what one sitting covers.