diff --git a/fire/core.py b/fire/core.py
index 37af3493..28dd4cb5 100644
--- a/fire/core.py
+++ b/fire/core.py
@@ -255,7 +255,8 @@ def _OneLineResult(result):
     return str(result).replace('\n', ' ')
 
   try:
-    return json.dumps(result)
+    # non-forced to ascii convert
+    return json.dumps(result, ensure_ascii=False)
   except (TypeError, ValueError):
     return str(result).replace('\n', ' ')