diff --git a/services/ml_helpers.py b/services/ml_helpers.py
index d05a582..6db23d4 100644
--- a/services/ml_helpers.py
+++ b/services/ml_helpers.py
@@ -1,7 +1,6 @@
-# Copyright 2018 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file or at
-# https://developers.google.com/open-source/licenses/bsd
+# Copyright 2018 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
 
 """
 Helper functions for spam and component classification. These are mostly for
@@ -16,7 +15,6 @@
 
 import csv
 import hashlib
-import httplib2
 import logging
 import re
 import sys
@@ -31,7 +29,7 @@
 
 SPAM_COLUMNS = ['verdict', 'subject', 'content', 'email']
 LEGACY_CSV_COLUMNS = ['verdict', 'subject', 'content']
-DELIMITERS = ['\s', '\,', '\.', '\?', '!', '\:', '\(', '\)']
+DELIMITERS = [r'\s', r'\,', r'\.', r'\?', '!', r'\:', r'\(', r'\)']
 
 # Must be identical to settings.spam_feature_hashes.
 SPAM_FEATURE_HASHES = 500
@@ -175,7 +173,7 @@
   """Sets up an instance of ml engine for ml classes."""
   try:
     credentials = GoogleCredentials.get_application_default()
-    ml_engine = build('ml', 'v1', http=httplib2.Http(), credentials=credentials)
+    ml_engine = build('ml', 'v1', credentials=credentials)
     return ml_engine
 
   except (Oauth2ClientError, ApiClientError):