diff --git a/requirements.txt b/requirements.txt
index 9f8a8dd..509fc9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ entrypoints==0.2.3
 gast==0.2.0
 grpcio==1.11.0
 h5py==2.7.1
-html5lib==0.9999999
+html5lib==0.999999999
 idna==2.7
 imagesize==1.0.0
 ipdb==0.11