diff --git a/requirements.txt b/requirements.txt
index e6b8e62..2e62fb8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ enum34==1.1.10
 gast==0.4.0
 grpcio==1.33.2
 h5py==3.1.0
-html5lib==0.9999999
+html5lib==0.999999999
 importlib-metadata==2.0.0
 kiwisolver==1.3.1
 Markdown==3.3.3