diff --git a/.ci/update_setup_version.py b/.ci/update_setup_version.py
index 6b41c80..d5e5c3e 100644
--- a/.ci/update_setup_version.py
+++ b/.ci/update_setup_version.py
@@ -66,7 +66,7 @@ def update_version(self, is_release=False):
         else:
             print('this is a feature merge')
             self.get_new_bumps_from_title()
-            new_version = ''.join([f'{i:02}' for i in self.get_new_version(dev_version).split('.')])
+            new_version = ''.join([f'{int(i):02}' for i in self.get_new_version(dev_version).split('.')])
             new_version = f'{main_version}.dev{new_version}'
         print(f'new_version: {new_version}')