diff --git a/requirements.txt b/requirements.txt
index 92da62d..578f46e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ liac-arff==2.4.0
 lockfile==0.12.2
 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