diff --git a/requirements.txt b/requirements.txt
index 5b1efed..6817d17 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ funcsigs==1.0.2
 functools32==3.2.3-2
 gpiozero==1.3.1
 hiredis==0.2.0
-html5lib==0.999
+html5lib==0.999999999
 ipython==2.3.0
 ipython-genutils==0.2.0
 itsdangerous==0.24