diff --git a/requirements.txt b/requirements.txt
index 00ebb67..0b50a7e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -50,7 +50,7 @@ lxml==4.2.1
 Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==2.2.3
-mistune==0.8.3
+mistune==2.0.3
 MySQL-python==1.2.5
 mysqlclient==1.3.12
 nbconvert==5.3.1