diff --git a/ietf/utils/html.py b/ietf/utils/html.py
index 499189635..c0f717cc9 100644
--- a/ietf/utils/html.py
+++ b/ietf/utils/html.py
@@ -28,11 +28,8 @@ class HTMLSanitizerMixin(sanitizer.HTMLSanitizerMixin):
     allowed_svg_properties = ()
 
 class HTMLSanitizer(tokenizer.HTMLTokenizer, HTMLSanitizerMixin):
-    def __init__(self, stream, encoding=None, parseMeta=True, useChardet=True,
-                 lowercaseElementName=True, lowercaseAttrName=True):
-        tokenizer.HTMLTokenizer.__init__(self, stream, encoding, parseMeta,
-                                         useChardet, lowercaseElementName,
-                                         lowercaseAttrName)
+    def __init__(self, *args, **kwargs):
+        tokenizer.HTMLTokenizer.__init__(self, *args, **kwargs)
 
     def __iter__(self):
         for token in tokenizer.HTMLTokenizer.__iter__(self):
diff --git a/requirements.txt b/requirements.txt
index 697b72f40..8a172e928 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,7 @@ defusedxml>=0.4.1		# for TastyPie when ussing xml; not a declared dependency
 django-bootstrap3>=5.1.1
 django-widget-tweaks>=1.3
 docutils>=0.12                  
+html5lib>=0.90
 #lxml>=3.4.0                    # for PyQuery; 
 mimeparse>=0.1.3		# for TastPie
 MySQL-python>=1.2.5