diff --git a/mitmproxy/net/http/http1/read.py b/mitmproxy/net/http/http1/read.py
index ef88fd6ce..491135ac0 100644
--- a/mitmproxy/net/http/http1/read.py
+++ b/mitmproxy/net/http/http1/read.py
@@ -271,7 +271,9 @@ def _parse_authority_form(hostport):
             ValueError, if the input is malformed
     """
     try:
-        host, port = hostport.split(b":")
+        host, port = hostport.rsplit(b":", 1)
+        if host.startswith(b"[") and host.endswith(b"]"):
+            host = host[1:-1]
         port = int(port)
         if not check.is_valid_host(host) or not check.is_valid_port(port):
             raise ValueError()
diff --git a/test/mitmproxy/net/http/http1/test_read.py b/test/mitmproxy/net/http/http1/test_read.py
index 642b91c04..b3589c928 100644
--- a/test/mitmproxy/net/http/http1/test_read.py
+++ b/test/mitmproxy/net/http/http1/test_read.py
@@ -243,6 +243,7 @@ def test_read_request_line():
 
 def test_parse_authority_form():
     assert _parse_authority_form(b"foo:42") == (b"foo", 42)
+    assert _parse_authority_form(b"[2001:db8:42::]:443") == (b"2001:db8:42::", 443)
     with pytest.raises(exceptions.HttpSyntaxException):
         _parse_authority_form(b"foo")
     with pytest.raises(exceptions.HttpSyntaxException):