diff --git a/uapi/appapi.py b/uapi/appapi.py
index 04120ff..6549dfa 100644
--- a/uapi/appapi.py
+++ b/uapi/appapi.py
@@ -179,11 +179,14 @@ class UAPI:
 			if line.startswith(filter):
 				line = line[len(filter):]
 				if self.uapi.response:
-					dic = json.loads(line.decode('utf-8'))
-					line = self.rendertmpl(self.uapi.response, dic)
-				debug(f'{line=}')
+					try:
+						dic = json.loads(line.decode('utf-8'))
+						line = self.rendertmpl(self.uapi.response, dic)
+					except Exception as e:
+						debug(f'{line=}, {self.uapi.response=} error({e})\n{format_exc()}')
+						pass
 				if len(line):
-					yield line + '\n'
+					yield f'{json.dumps(line)}\n'
 			else:
 				debug(f'invalid line:{line}')