diff --git a/rdagent/scenarios/qlib/proposal/quant_proposal.py b/rdagent/scenarios/qlib/proposal/quant_proposal.py
index b42d926f..1ada679e 100644
--- a/rdagent/scenarios/qlib/proposal/quant_proposal.py
+++ b/rdagent/scenarios/qlib/proposal/quant_proposal.py
@@ -1,3 +1,4 @@
+import logging
 import json
 import os
 import random