diff --git a/HISTORY.txt b/HISTORY.txt
--- a/HISTORY.txt
+++ b/HISTORY.txt
@@ -1,3 +1,9 @@
+
+
+~~~~~~~~~~~~
+
+4.6-compatibility
+
 1.1.8
 ~~~~~~~~~~~~~
 
diff --git a/mercurial_keyring.py b/mercurial_keyring.py
--- a/mercurial_keyring.py
+++ b/mercurial_keyring.py
@@ -58,7 +58,7 @@ import os
 import sys
 import re
 
-from mercurial import util, sslutil
+from mercurial import util, sslutil, error
 from mercurial.i18n import _
 from mercurial.url import passwordmgr
 from mercurial import mail
@@ -95,7 +95,7 @@ def import_meu():
         try:
             import mercurial_extension_utils
         except ImportError:
-            raise util.Abort(_("""Can not import mercurial_extension_utils.
+            raise error.Abort(_("""Can not import mercurial_extension_utils.
 Please install this module in Python path.
 See Installation chapter in https://bitbucket.org/Mekk/mercurial_keyring/ for details
 (and for info about TortoiseHG on Windows, or other bundled Python)."""))
@@ -328,7 +328,7 @@ class HTTPPasswordHandler(object):
         auth_user, auth_pwd, keyring_url = self.get_url_config(
             ui, parsed_url, actual_user)
         if auth_user and actual_user and (actual_user != auth_user):
-            raise util.Abort(_('keyring: username for %s specified both in repository path (%s) and in .hg/hgrc/[auth] (%s). Please, leave only one of those' % (base_url, actual_user, auth_user)))
+            raise error.Abort(_('keyring: username for %s specified both in repository path (%s) and in .hg/hgrc/[auth] (%s). Please, leave only one of those' % (base_url, actual_user, auth_user)))
         if auth_user and auth_pwd:
             return auth_user, auth_pwd, self.SRC_CFGAUTH, keyring_url
 
@@ -356,7 +356,7 @@ class HTTPPasswordHandler(object):
     def prompt_interactively(ui, user, realm, url):
         """Actual interactive prompt"""
         if not ui.interactive():
-            raise util.Abort(_('keyring: http authorization required but program used in non-interactive mode'))
+            raise error.Abort(_('keyring: http authorization required but program used in non-interactive mode'))
 
         if not user:
             ui.status(_("keyring: username not specified in hgrc (or in url). Password will not be saved.\n"))
@@ -607,7 +607,7 @@ def try_smtp_login(ui, smtp_obj, usernam
             ui.status(_("SMTP login failed: %s\n\n") % inst.smtp_error)
             return False
         else:
-            raise util.Abort(inst)
+            raise error.Abort(inst)
 
 
 def keyring_supported_smtp(ui, username):
@@ -626,14 +626,14 @@ def keyring_supported_smtp(ui, username)
     starttls = tls == 'starttls' or util.parsebool(tls)
     smtps = tls == 'smtps'
     if (starttls or smtps) and not util.safehasattr(socket, 'ssl'):
-        raise util.Abort(_("can't use TLS: Python SSL support not installed"))
+        raise error.Abort(_("can't use TLS: Python SSL support not installed"))
     mailhost = ui.config('smtp', 'host')
     if not mailhost:
-        raise util.Abort(_('smtp.host not configured - cannot send mail'))
+        raise error.Abort(_('smtp.host not configured - cannot send mail'))
     verifycert = ui.config('smtp', 'verifycert', 'strict')
     if verifycert not in ['strict', 'loose']:
         if util.parsebool(verifycert) is not False:
-            raise util.Abort(_('invalid smtp.verifycert configuration: %s')
+            raise error.Abort(_('invalid smtp.verifycert configuration: %s')
                              % (verifycert))
         verifycert = False
     if getattr(sslutil, 'sslkwargs', None) is None:
@@ -699,9 +699,9 @@ def keyring_supported_smtp(ui, username)
             return s.sendmail(sender, recipients, msg)
         except smtplib.SMTPRecipientsRefused, inst:
             recipients = [r[1] for r in inst.recipients.values()]
-            raise util.Abort('\n' + '\n'.join(recipients))
+            raise error.Abort('\n' + '\n'.join(recipients))
         except smtplib.SMTPException, inst:
-            raise util.Abort(inst)
+            raise error.Abort(inst)
 
     return send