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-rw-r--r--mitmproxy/tools/web/app.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/mitmproxy/tools/web/app.py b/mitmproxy/tools/web/app.py
index b7cf2c9d..f873b351 100644
--- a/mitmproxy/tools/web/app.py
+++ b/mitmproxy/tools/web/app.py
@@ -194,7 +194,7 @@ class WebSocketEventBroadcaster(tornado.websocket.WebSocketHandler):
@classmethod
def broadcast(cls, **kwargs):
- message = json.dumps(kwargs, ensure_ascii=False)
+ message = json.dumps(kwargs, ensure_ascii=False).encode("utf8", "surrogateescape")
for conn in cls.connections:
try: