diff --git a/requirements.txt b/requirements.txt
index af4bf83..f0ec254 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ jupyter-core==4.4.0
 kiwisolver==1.0.1
 MarkupSafe==1.0
 matplotlib==3.0.1
-mistune==0.8.4
+mistune==2.0.3
 mongoengine==0.15.3
 nbconvert==5.4.0
 nbformat==4.4.0