diff --git a/APR2019_MeetUp/requirements.txt b/APR2019_MeetUp/requirements.txt
index 407b277..db2e9d8 100644
--- a/APR2019_MeetUp/requirements.txt
+++ b/APR2019_MeetUp/requirements.txt
@@ -22,7 +22,7 @@ jupyterlab-server==0.2.0
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.1.0
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.5.0
 nbformat==4.4.0
 notebook==5.7.8