diff --git a/convlab/policy/ppo/GenTUS-BertNLU-RuleDST-PPOPolicy.json b/convlab/policy/ppo/configs/GenTUS-BertNLU-RuleDST-PPOPolicy.json
similarity index 100%
rename from convlab/policy/ppo/GenTUS-BertNLU-RuleDST-PPOPolicy.json
rename to convlab/policy/ppo/configs/GenTUS-BertNLU-RuleDST-PPOPolicy.json
diff --git a/convlab/policy/ppo/emoUS-BertNLU-RuleDST-PPOPolicy.json b/convlab/policy/ppo/configs/emoUS-BertNLU-RuleDST-PPOPolicy.json
similarity index 99%
rename from convlab/policy/ppo/emoUS-BertNLU-RuleDST-PPOPolicy.json
rename to convlab/policy/ppo/configs/emoUS-BertNLU-RuleDST-PPOPolicy.json
index eba5bde86b5387c96dbf2b6be2d89c3e0bb71cdb..f3f4c4f1f40b91dd51de9274775cb49dd76ef088 100644
--- a/convlab/policy/ppo/emoUS-BertNLU-RuleDST-PPOPolicy.json
+++ b/convlab/policy/ppo/configs/emoUS-BertNLU-RuleDST-PPOPolicy.json
@@ -54,4 +54,4 @@
         }
     },
     "usr_nlg": {}
-}
\ No newline at end of file
+}
diff --git a/setup.py b/setup.py
index b88454ccc61aa941f888e69494e030848599f558..0a94fb0e50cbc36f96b4b3102690656bfa10f2e1 100755
--- a/setup.py
+++ b/setup.py
@@ -77,6 +77,6 @@ setup(
     url='https://github.com/ConvLab/ConvLab-3',
     author='convlab',
     author_email='convlab@googlegroups.com',
-    python_requires='>=3.7',
+    python_requires='>=3.8',
     zip_safe=False
 )