diff --git a/main.py b/main.py
index decc4a5d37a55ecd49b465a6d5f55a7110ddf6b7..de17f6515a661db6e0a239efed9ef80bf7c367fd 100644
--- a/main.py
+++ b/main.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 from json import load
 from src.tree import TreeWalker, load_json, dump_json
 
diff --git a/src/tree.py b/src/tree.py
index 61b5b8950df71658adfa6243961eab5ca45a8da2..6a9e39fc518542f858f1f80635b35164b046e6ba 100644
--- a/src/tree.py
+++ b/src/tree.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 import logging
 from genericpath import exists
 import json
@@ -16,7 +17,7 @@ logger.addHandler(handler)
 
 
 def load_json(p):
-    with open(p, 'r') as f:
+    with open(p, 'r', encoding='utf-8') as f:
         return json.loads(f.read())
 
 
@@ -29,7 +30,7 @@ def dump_json(p, j, exist_ok=False, override=False):
             logger.error(f"{p} already exist")
             sys.exit(0)
 
-    with open(p, 'w+') as f:
+    with open(p, 'w+', encoding='utf-8') as f:
         f.write(json.dumps(j, indent=2, ensure_ascii=False))