diff --git a/cmd/acb-index-builder/main.go b/cmd/acb-index-builder/main.go
index ff6d0b7..1551315 100644
--- a/cmd/acb-index-builder/main.go
+++ b/cmd/acb-index-builder/main.go
@@ -356,6 +356,7 @@ func fetchRecentMatchIDs(ctx context.Context, db *sql.DB, since time.Duration) (
 		WHERE status = 'completed'
 		  AND completed_at > NOW() - $1::interval
 		ORDER BY completed_at DESC
+		LIMIT 5000
 	`
 
 	intervalStr := fmt.Sprintf("%.0f seconds", since.Seconds())