diff --git a/requirements.txt b/requirements.txt
index 2f9f42c..62f941a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ enum34==1.1.6
 futures==3.1.1
 grpcio==1.7.0
 grpcio-tools==1.8.4
-html5lib==0.9999999
+html5lib==0.99999999
 jmespath==0.9.3
 Markdown==2.6.9
 numpy==1.13.3