diff --git a/rplugin/python3/deoplete/sources/__pycache__/contacts.cpython-38.pyc b/rplugin/python3/deoplete/sources/__pycache__/contacts.cpython-38.pyc
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diff --git a/rplugin/python3/deoplete/sources/contacts.py b/rplugin/python3/deoplete/sources/contacts.py
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+++ b/rplugin/python3/deoplete/sources/contacts.py
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+# Modified by Jonathan Hodgson
+
+# Originally from https://github.com/michaeladler/deoplete-abook/blob/master/rplugin/python3/deoplete/sources/abook.py
+# Original Copyright:
+# Copyright (c) 2017 Filip Szymański. All rights reserved.
+# Use of this source code is governed by an MIT license that can be
+# found in the LICENSE file.
+
+import configparser
+import os.path
+import re
+
+from .base import Base  # pylint: disable=E0401
+
+
+# pylint: disable=W0201,W0613
+class Source(Base):
+    COLON_PATTERN = re.compile(r':\s?')
+    COMMA_PATTERN = re.compile(r'.+,\s?')
+    HEADER_PATTERN = re.compile(r'^(Bcc|Cc|From|Reply-To|To):(\s?|.+,\s?)')
+
+    def __init__(self, vim):
+        super().__init__(vim)
+
+        self.__cache = []
+
+        self.filetypes = ['mail']
+        self.mark = '[abook]'
+        self.matchers = ['matcher_length', 'matcher_full_fuzzy']
+        self.min_pattern_length = 0
+        self.name = 'abook'
+
+    def on_init(self, context):
+        self.__datafile = context['vars'].get('deoplete#sources#abook#datafile',
+                                              os.path.expanduser('~/.abook/addressbook'))
+        if not os.path.isfile(self.__datafile):
+            self.vim.err_write('[deoplete-abook] No such file: {0}\n'.format(self.__datafile))
+
+    def on_event(self, context):
+        self.__make_cache()
+
+    def gather_candidates(self, context):
+        if self.HEADER_PATTERN.search(context['input']) is not None:
+            if not self.__cache:
+                self.__make_cache()
+
+            return self.__cache
+
+    def get_complete_position(self, context):
+        colon = self.COLON_PATTERN.search(context['input'])
+        comma = self.COMMA_PATTERN.search(context['input'])
+        return max(colon.end() if colon is not None else -1,
+                   comma.end() if comma is not None else -1)
+
+    def __make_cache(self):
+        addressbook = configparser.ConfigParser()
+        addressbook.read(self.__datafile)
+        for section in addressbook.sections():
+            emails = addressbook.get(section, 'email', fallback=None)
+            if emails is not None:
+                name = addressbook.get(section, 'name', fallback=None)
+                for email in emails.split(','):
+                    if name is not None:
+                        email = '"{0}" <{1}>'.format(name, email)
+
+                    self.__cache.append({'word': email})
+
+# vim: ts=4 et sw=4