diff --git a/requirements.txt b/requirements.txt
index b200d4f..5e7070f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ kiwisolver==1.2.0
 Markdown==3.2.2
 MarkupSafe==1.1.1
 matplotlib==3.2.2
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.1.0
 mkl-random==1.1.1
 mkl-service==2.3.0