diff --git a/requirements.txt b/requirements.txt
index dfb5e49..0275b3a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ gast==0.2.0
 gensim==3.4.0
 graphviz==0.8.3
 grpcio==1.11.0
-html5lib==0.9999999
+html5lib==0.999999999
 idna==2.6
 intel-openmp==2018.0.0
 ipykernel==4.8.2