diff --git a/brozzler/chrome.py b/brozzler/chrome.py
index f3a4841..a83632b 100644
--- a/brozzler/chrome.py
+++ b/brozzler/chrome.py
@@ -184,6 +184,7 @@ class Chrome:
             self.chrome_exe,
             "-v",
             "--remote-debugging-port=%s" % self.port,
+            "--remote-allow-origins=http://localhost:%s" % self.port,
             "--use-mock-keychain",  # mac thing
             "--user-data-dir=%s" % self._chrome_user_data_dir,
             "--disable-background-networking",