diff --git a/j2s.py b/j2s.py
index 88ea50a15b7729c8b06db8f1eb4e61c474e23f6e..02065c39db0c8667c9faf7a93120b9ae146d0f03 100644
--- a/j2s.py
+++ b/j2s.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+#coding: utf-8
 
 import math
 import numpy as np