diff --git a/ml_backend/ml_backend/requirements.txt b/ml_backend/ml_backend/requirements.txt
index be60ee75..f7fe1633 100644
--- a/ml_backend/ml_backend/requirements.txt
+++ b/ml_backend/ml_backend/requirements.txt
@@ -4,7 +4,7 @@ click==6.7
 Flask==0.12.2
 funcsigs==1.0.2
 h5py==2.7.1
-html5lib==0.9999999
+html5lib==0.999999999
 itsdangerous==0.24
 Jinja2==2.9.6
 Keras==2.0.8