diff --git a/python/examples/criteo_ctr_with_cube/benchmark.py b/python/examples/criteo_ctr_with_cube/benchmark.py
index 8cdc6dc7aa30f747391f97c1a97da0ae4b7a03f1..12abbc9cd3777daf4ebb0b14aaa4cba6aceed875 100755
--- a/python/examples/criteo_ctr_with_cube/benchmark.py
+++ b/python/examples/criteo_ctr_with_cube/benchmark.py
@@ -24,7 +24,7 @@ from paddle_serving_client.utils import MultiThreadRunner
 from paddle_serving_client.utils import benchmark_args
 from paddle_serving_client.metric import auc
 
-bash: npm: command not found
+py_version = sys.version_info[0]
 args = benchmark_args()