diff --git a/requirements.txt b/requirements.txt
index 3145d5c..a3cbbcd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ green==2.13.0
 grpcio==1.12.0
 grpcio-tools==1.12.0
 h5py==2.8.0
-html5lib==0.9999999
+html5lib==0.999999999
 idna==2.6
 jmespath==0.9.3
 Keras==2.2.4