diff --git a/backend/requirements.txt b/backend/requirements.txt
index eed2fc300..a6e3b9ce0 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -17,7 +17,7 @@ factory-boy==2.8.1
 Faker==0.7.12
 flake8==3.3.0
 flake8-polyfill==1.0.1
-html5lib==0.999
+html5lib==0.999999999
 httpie==0.9.9
 mando==0.3.3
 Markdown==2.6.8