diff --git a/CHANGELOG.md b/CHANGELOG.md
index b0924b0dd..0c1c4bae4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 
 * Add support for reading HAR files using the existing flow loading APIs, e.g. `mitmproxy -r example.har`.
   ([#6335](https://github.com/mitmproxy/mitmproxy/pull/6335), @stanleygvi)
+* Increase maximum dump file size accepted by mitmweb
+  ([#6373](https://github.com/mitmproxy/mitmproxy/pull/6373), @t-wy)
 
 
 ## 04 August 2023: mitmproxy 10.0.0
diff --git a/mitmproxy/tools/web/master.py b/mitmproxy/tools/web/master.py
index 04daa221f..520cf4d4e 100644
--- a/mitmproxy/tools/web/master.py
+++ b/mitmproxy/tools/web/master.py
@@ -97,7 +97,9 @@ class WebMaster(master.Master):
         tornado.ioloop.IOLoop.current()
 
         # Add our web app.
-        http_server = tornado.httpserver.HTTPServer(self.app)
+        http_server = tornado.httpserver.HTTPServer(
+            self.app, max_buffer_size=2**32
+        )  # 4GB
         try:
             http_server.listen(self.options.web_port, self.options.web_host)
         except OSError as e: