diff --git a/lib/filter/sim/tb_fir_semi_parallel.fdo b/lib/filter/sim/tb_fir_semi_parallel.fdo
index 00f36a0..fb8b644 100644
--- a/lib/filter/sim/tb_fir_semi_parallel.fdo
+++ b/lib/filter/sim/tb_fir_semi_parallel.fdo
@@ -16,4 +16,4 @@ do {tb_fir_semi_parallel.wdo}
 view wave
 view structure
 view signals
-run 220us
+run 520us