diff --git a/requirements.txt b/requirements.txt
index 716ec0e..4a1d87d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ lxml==4.3.4
 mammoth==1.4.9
 MarkupSafe==1.1.1
 matplotlib==3.1.0
-mistune==0.8.4
+mistune==2.0.3
 murmurhash==1.0.2
 nbconvert==5.5.0
 nbformat==4.4.0