diff --git a/requirements.txt b/requirements.txt
index 88e45ef..a190ba6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==2.2.2
 -e git+https://github.com/lmkoch/medpy/@b06b6decf41c63489e746f6a83e8fa5ff509adfa#egg=MedPy
-mistune==0.8.3
+mistune==2.0.3
 nbconvert==5.3.1
 nbformat==4.4.0
 networkx==2.1