diff --git a/Lib/json/tool.py b/Lib/json/tool.py
index 5932f4ecded7eb1..4b78d0f97be3791 100644
--- a/Lib/json/tool.py
+++ b/Lib/json/tool.py
@@ -22,7 +22,7 @@ def main():
     parser = argparse.ArgumentParser(prog=prog, description=description)
     parser.add_argument('infile', nargs='?', type=argparse.FileType(),
                         help='a JSON file to be validated or pretty-printed')
-    parser.add_argument('outfile', nargs='?', type=argparse.FileType('w'),
+    parser.add_argument('outfile', nargs='?', type=argparse.FileType('w', encoding='utf-8'),
                         help='write the output of infile to outfile')
     parser.add_argument('--sort-keys', action='store_true', default=False,
                         help='sort the output of dictionaries alphabetically by key')
@@ -37,7 +37,7 @@ def main():
         except ValueError as e:
             raise SystemExit(e)
     with outfile:
-        json.dump(obj, outfile, sort_keys=sort_keys, indent=4)
+        outfile.write(json.dumps(obj,ensure_ascii=False,sort_keys=sort_keys, indent=4))
         outfile.write('\n')