diff --git a/requirements.txt b/requirements.txt
index 6dfc375..d0eccd6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ jupyter-core==4.6.1
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.1.2
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.1
 nbdime==1.1.0
 nbformat==4.4.0