diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 5805dda..87b2d22
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ jupyter-client==5.2.4
 jupyter-core==4.4.0
 kombu==4.3.0
 MarkupSafe==1.1.0
-mistune==0.8.4
+mistune==2.0.3
 mysqlclient==1.4.1
 nbconvert==5.4.0
 nbformat==4.4.0