diff --git a/HW6/requirements.txt b/HW6/requirements.txt
index c3795a1..afc0ef9 100644
--- a/HW6/requirements.txt
+++ b/HW6/requirements.txt
@@ -16,7 +16,7 @@ jupyter-console==5.1.0
 jupyter-core==4.3.0
 MarkupSafe==1.0
 matplotlib==2.0.2
-mistune==0.7.4
+mistune==0.8.1
 nbconvert==5.2.1
 nbformat==4.3.0
 networkx==1.11