diff --git a/requirements.txt b/requirements.txt
index d2e7183..a4ff831 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ jupyter-core==4.4.0
 jupyterlab==0.35.4
 jupyterlab-server==0.2.0
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.4.1
 nbformat==4.4.0
 notebook==6.1.5