diff --git a/requirements.txt b/requirements.txt
index f134a71..4ca5f88 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ cycler==0.10.0
 decorator==4.1.2
 entrypoints==0.2.3
 Flask
-html5lib==0.9999999
+html5lib==0.99999999
 ipykernel==4.6.1
 ipython==6.1.0
 ipython-genutils==0.2.0