diff --git a/requirements.txt b/requirements.txt
index 7d973fe..ad6750f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ entrypoints==0.3
 future==0.17.1
 gast==0.2.2
 grpcio==1.19.0
-html5lib==0.9999999
+html5lib==0.99999999
 idna==2.8
 ipykernel==5.1.0
 ipython==7.3.0