diff --git a/requirements.txt b/requirements.txt
index 0ea7eb3..518c8fa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ jupyter-core==4.5.0
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.0
 nbformat==4.4.0
 notebook==6.1.5