diff --git a/Dockerfile/requirements.txt b/Dockerfile/requirements.txt
index 8dbe802..67f22a5 100644
--- a/Dockerfile/requirements.txt
+++ b/Dockerfile/requirements.txt
@@ -7,7 +7,7 @@ decorator==4.1.2
 entrypoints==0.2.3
 Flask==1.1.1
 Flask-RESTful==0.3.8
-html5lib==0.9999999
+html5lib==0.999999999
 ipykernel==4.6.1
 ipython==6.1.0
 ipython-genutils==0.2.0