diff --git a/setup.py b/setup.py
index 4286529927f3216228bc4e465802e62a2f27dea4..59329cdc3c7a56c6e4367e49d0c2f1a6d82a7f44 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ with open("requirements.txt", "r") as f:
 setuptools.setup(
     name='csst_ifs_sim',
     # Internal_Version = '0.7.02',
-    version='1.0.0',
+    version='1.2.0',
     author='CSST Team',
     author_email='zhaojunyan@shao.ac.cn',
     description='The CSST - ifs - sim',  # short description