diff --git a/requirements.txt b/requirements.txt
index 373912d..a52b59d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 bleach>=3.1.1
 cycler==0.10.0
 decorator==4.1.2
-html5lib==0.9999999
+html5lib==0.999999999
 ipdb==0.10.3
 ipython==6.2.0
 ipython-genutils==0.2.0