diff --git a/requirements.txt b/requirements.txt
index 62dfc13..6f79455 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ chardet==3.0.4
 click==6.7
 Flask==0.12
 h5py==2.7.0
-html5lib==0.9999999
+html5lib==0.999999999
 idna==2.5
 itsdangerous==0.24
 Jinja2==2.10