diff --git a/requirements.txt b/requirements.txt
index 6db53f5..ddfe229 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ jupyter==1.0.0
 jupyter-client==5.2.4
 jupyter-console==6.0.0
 jupyter-core==4.4.0
-html5lib==0.9999999
+html5lib==0.99999999
 ipython==5.3.0
 ipython-genutils==0.2.0
 matplotlib==1.3.1