diff --git a/CHANGES.md b/CHANGES.md
index cb3d1f7..0a52604 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -3,6 +3,7 @@
 * Update CacheControl library 0.12.5 (cd91309) to 0.12.5 (0fedbba)
 * Update Certifi 2018.08.24 (8be9f89) to 2018.10.15 (a462d21)
 * Update dateutil 2.7.2 (49690ee) to 2.7.5 (e954819)
+* Update html5lib 1.1-dev (e9ef538) to 1.1-dev (4f92357)
 * Update Requests library 2.19.1 (2c6a842) to 2.20.1 (57d7284)
 * Update Six compatibility library 1.11.0 (68112f3) to 1.11.0 (0b4265e)
 * Update urllib3 release 1.23 (7c216f4) to 1.24.1 (a6ec68a)
diff --git a/lib/html5lib/_inputstream.py b/lib/html5lib/_inputstream.py
index c20e94f..37d749c 100644
--- a/lib/html5lib/_inputstream.py
+++ b/lib/html5lib/_inputstream.py
@@ -1,10 +1,11 @@
 from __future__ import absolute_import, division, unicode_literals
 
-from six import text_type, binary_type
+from six import text_type
 from six.moves import http_client, urllib
 
 import codecs
 import re
+from io import BytesIO, StringIO
 
 import webencodings
 
@@ -12,13 +13,6 @@ from .constants import EOF, spaceCharacters, asciiLetters, asciiUppercase
 from .constants import _ReparseException
 from . import _utils
 
-from io import StringIO
-
-try:
-    from io import BytesIO
-except ImportError:
-    BytesIO = StringIO
-
 # Non-unicode versions of constants for use in the pre-parser
 spaceCharactersBytes = frozenset([item.encode("ascii") for item in spaceCharacters])
 asciiLettersBytes = frozenset([item.encode("ascii") for item in asciiLetters])
@@ -908,7 +902,7 @@ class ContentAttrParser(object):
 def lookupEncoding(encoding):
     """Return the python codec name corresponding to an encoding or None if the
     string doesn't correspond to a valid encoding."""
-    if isinstance(encoding, binary_type):
+    if isinstance(encoding, bytes):
         try:
             encoding = encoding.decode("ascii")
         except UnicodeDecodeError:
diff --git a/lib/html5lib/_trie/_base.py b/lib/html5lib/_trie/_base.py
index a1158bb..6b71975 100644
--- a/lib/html5lib/_trie/_base.py
+++ b/lib/html5lib/_trie/_base.py
@@ -1,6 +1,9 @@
 from __future__ import absolute_import, division, unicode_literals
 
-from collections import Mapping
+try:
+    from collections.abc import Mapping
+except ImportError:  # Python 2.7
+    from collections import Mapping
 
 
 class Trie(Mapping):
diff --git a/lib/html5lib/treebuilders/dom.py b/lib/html5lib/treebuilders/dom.py
index dcfac22..d8b5300 100644
--- a/lib/html5lib/treebuilders/dom.py
+++ b/lib/html5lib/treebuilders/dom.py
@@ -1,7 +1,10 @@
 from __future__ import absolute_import, division, unicode_literals
 
 
-from collections import MutableMapping
+try:
+    from collections.abc import MutableMapping
+except ImportError:  # Python 2.7
+    from collections import MutableMapping
 from xml.dom import minidom, Node
 import weakref