diff --git a/extraction/named_entity/CDMA/requirements.txt b/extraction/named_entity/CDMA/requirements.txt
index 313ed5293..874b4fb80 100644
--- a/extraction/named_entity/CDMA/requirements.txt
+++ b/extraction/named_entity/CDMA/requirements.txt
@@ -26,7 +26,7 @@ kiwisolver==1.0.1
 Markdown==3.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3
-mistune==0.8.4
+mistune==2.0.3
 mock==2.0.0
 nbconvert==5.5.0
 nbformat==4.4.0