diff --git a/requirements.txt b/requirements.txt
index 110012e2..a0c18bea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ jupyter-core==4.4.0
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.1.0
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.5.0
 nbformat==4.4.0
 nose==1.3.7