diff --git a/pytomoatt/para.py b/pytomoatt/para.py
index daff76d..116cb3f 100644
--- a/pytomoatt/para.py
+++ b/pytomoatt/para.py
@@ -11,7 +11,7 @@ def __init__(self, fname: str) -> None:
         :type fname: str
         """
         self.fname = fname
-        with open(fname) as f:
+        with open(fname, encoding='utf-8') as f:
             file_data = f.read()
         self.input_params = yaml.load(file_data, Loader=yaml.Loader)
 
@@ -32,4 +32,4 @@ def write(self, fname=None):
         """
         if fname is None:
             fname = self.fname
-        yaml.dump(self.input_params, fname, Dumper=yaml.Dumper)
\ No newline at end of file
+        yaml.dump(self.input_params, fname, Dumper=yaml.Dumper)