diff --git a/woa/media.py b/woa/media.py
index 209a21a..f9679ef 100644
--- a/woa/media.py
+++ b/woa/media.py
@@ -116,12 +116,12 @@ class WeChatMediaManager:
 
 			async with aiohttp.ClientSession(timeout=timeout) as session:
 				async with session.post(url, data=form) as resp:
-					result = await resp.json()
-
-					if resp.status == 200 and ('media_id' in result or 'url' in result):
+					text = await resp.text()
+					if resp.status == 200:
+						result = json.loads(text)
 						return result['media_id']
 					else:
-						raise Exception(f"WeChat Upload Error: {result}")
+						raise Exception(f"WeChat Upload Error: {text}")
 
 		finally:
 			f.close()   # 手动关闭