diff --git a/requirements.txt b/requirements.txt
index 5d515f7a1..225d1fb31 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,3 +16,4 @@ pytest>=3.0.6,<4.0.0
 mock>=2.0.0,<3.0.0
 msgpack-python
 msgpack-numpy
+html5lib==1.0b8