diff --git a/requirements.txt b/requirements.txt
index faf8d6f..0b3331e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -69,7 +69,7 @@ Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.3.4
 mglearn==0.1.7
-mistune==0.8.4
+mistune==2.0.3
 murmurhash==1.0.5
 nbconvert==5.6.1
 nbformat==5.0.4