diff --git a/setup.py b/setup.py
index 4fa0885..d3e73cd 100755
--- a/setup.py
+++ b/setup.py
@@ -26,13 +26,14 @@ import setuptools
 deps = [
     'certauth==1.1.6',
     'warctools>=4.10.0',
-    'urlcanon>=0.1.dev16',
+    'urlcanon>=0.3.0',
     'doublethink>=0.2.0.dev87',
     'urllib3>=1.14',
     'requests>=2.0.1',
     'PySocks>=1.6.8',
     'cryptography>=2.3',
     'idna>=2.5',
+    'PyYAML>=5.1',
 ]
 try:
     import concurrent.futures
@@ -41,7 +42,7 @@ except:
 
 setuptools.setup(
         name='warcprox',
-        version='2.4b7.dev197',
+        version='2.4.0',
         description='WARC writing MITM HTTP/S proxy',
         url='https://github.com/internetarchive/warcprox',
         author='Noah Levitt',
diff --git a/tests/test_warcprox.py b/tests/test_warcprox.py
index 7c6d21a..3c38d4e 100755
--- a/tests/test_warcprox.py
+++ b/tests/test_warcprox.py
@@ -965,12 +965,12 @@ def test_block_rules(http_daemon, https_daemon, warcprox_, archiving_proxies):
         },
         {
             "url_match": "SURT_MATCH",
-            "value": "http://(localhost:%s,)/fuh/" % (http_daemon.server_port),
+            "value": "http://(localhost,:%s)/fuh/" % (http_daemon.server_port),
         },
         {
             "url_match": "SURT_MATCH",
             # this rule won't match because of http scheme, https port
-            "value": "http://(localhost:%s,)/fuh/" % (https_daemon.server_port),
+            "value": "http://(localhost,:%s)/fuh/" % (https_daemon.server_port),
         },
         {
             "domain": "bad.domain.com",
diff --git a/warcprox/main.py b/warcprox/main.py
index 7fe5011..0ef5c58 100644
--- a/warcprox/main.py
+++ b/warcprox/main.py
@@ -30,6 +30,7 @@ except ImportError:
     import Queue as queue
 
 import logging
+import logging.config
 import sys
 import hashlib
 import argparse
@@ -39,6 +40,7 @@ import traceback
 import signal
 import threading
 import certauth.certauth
+import yaml
 import warcprox
 import doublethink
 import cryptography.hazmat.backends.openssl
@@ -239,6 +241,9 @@ def _build_arg_parser(prog='warcprox', show_hidden=False):
     arg_parser.add_argument(
             '--trace', dest='trace', action='store_true',
             help='very verbose logging')
+    arg_parser.add_argument(
+            '--logging-conf-file', dest='logging_conf_file', default=None,
+            help=('reads logging configuration from a YAML file'))
     arg_parser.add_argument(
             '--version', action='version',
             version="warcprox {}".format(warcprox.__version__))
@@ -302,6 +307,11 @@ def main(argv=None):
                 '%(asctime)s %(process)d %(levelname)s %(threadName)s '
                 '%(name)s.%(funcName)s(%(filename)s:%(lineno)d) %(message)s'))
 
+    if args.logging_conf_file:
+        with open(args.logging_conf_file, 'r') as fd:
+            conf = yaml.safe_load(fd)
+            logging.config.dictConfig(conf)
+
     # see https://github.com/pyca/cryptography/issues/2911
     cryptography.hazmat.backends.openssl.backend.activate_builtin_random()