diff --git a/model.xltx b/model.xltx
deleted file mode 100644
index 6c3d612..0000000
Binary files a/model.xltx and /dev/null differ
diff --git a/xls2ddl/xls2crud.py b/xls2ddl/xls2crud.py
index fdee0db..dcf80ee 100644
--- a/xls2ddl/xls2crud.py
+++ b/xls2ddl/xls2crud.py
@@ -253,7 +253,7 @@ def build_data_browser(pat: str, desc: dict):
 	desc.fieldliststr = json.dumps(field_list(desc), ensure_ascii=False, indent=4)
 	e = MyTemplateEngine([])
 	s = e.renders(data_browser_tmpl, desc)
-	with codecs.open(os.path.join(pat, f'index.ui', 'utf-8'), 'w', "utf-8") as f:
+	with codecs.open(os.path.join(pat, f'index.ui'), 'w', "utf-8") as f:
 		f.write(filter_backslash(s))
 
 def build_data_new(pat: str, desc: dict):
@@ -289,7 +289,7 @@ def build_check_changed(pat:str, desc:dict):
     e = MyTemplateEngine([])
     desc = desc.copy()
     s = e.renders(check_changed_tmpls, desc)
-    with codecs.open(os.path.join(pat, 'check_changed.dspy', "utf-8"), 'w') as f:
+    with codecs.open(os.path.join(pat, 'check_changed.dspy'), 'w') as f:
         f.write(filter_backslash(s))
 
 if __name__ == '__main__':