diff --git a/ibm-aggregator/requirements.txt b/ibm-aggregator/requirements.txt
index c945c48..cc4537e 100644
--- a/ibm-aggregator/requirements.txt
+++ b/ibm-aggregator/requirements.txt
@@ -40,7 +40,7 @@ kiwisolver==1.0.1
 kmodes==0.9
 MarkupSafe==1.0
 matplotlib==2.2.2
-mistune==0.8.3
+mistune==2.0.3
 more-itertools==4.2.0
 mpld3==0.3
 nbconvert==5.3.1