diff --git a/paddleslim/quant/post_quant_hpo.py b/paddleslim/quant/post_quant_hpo.py
index 92617a4c5f7a266a0fe29946bbe52fa564c2e053..9d631c6b9c6e4df8856c9c6a5b5a134b39a5be3c 100755
--- a/paddleslim/quant/post_quant_hpo.py
+++ b/paddleslim/quant/post_quant_hpo.py
@@ -417,8 +417,11 @@ def quant_post_hpo(
 
     try:
         import smac
+        assert smac.version == '1.4.0'
     except:
-        os.system('python -m pip install -U smac')
+        _logger.warning(
+            "smac==1.4.0 is required, please use \"pip install smac==1.4.0\".")
+        os.system('python -m pip install smac==1.4.0')
     # smac
     from ConfigSpace.hyperparameters import CategoricalHyperparameter, \
         UniformFloatHyperparameter, UniformIntegerHyperparameter