diff --git a/mirror/dependencies/pnda_requirements_py3.txt b/mirror/dependencies/pnda_requirements_py3.txt
index e41773f4..f83c5209 100644
--- a/mirror/dependencies/pnda_requirements_py3.txt
+++ b/mirror/dependencies/pnda_requirements_py3.txt
@@ -24,7 +24,7 @@ jupyterhub==0.7.0
 lxml==3.6.4
 Mako==1.0.6
 MarkupSafe==0.23
-mistune==0.7.3
+mistune==0.8.1
 mock==2.0.0
 nbconvert==5.0.0
 nbformat==4.2.0