[release] Update pypaimon version to 1.3.1
diff --git a/paimon-python/setup.py b/paimon-python/setup.py
index 4744eba..35cf4f1 100644
--- a/paimon-python/setup.py
+++ b/paimon-python/setup.py
@@ -18,7 +18,7 @@
 import os
 from setuptools import find_packages, setup
 
-VERSION = "1.3.0"
+VERSION = "1.3.1"
 
 PACKAGES = find_packages(include=["pypaimon*"])