diff --git a/requirements.txt b/requirements.txt
index ddee595..0cce795 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ bleach==3.3.0
 gast==0.2.0
 grpcio==1.11.0
 h5py==2.7.1
-html5lib==0.9999999
+html5lib==0.999999999
 Markdown==2.6.11
 numpy==1.14.2
 pandas==0.22.0