diff --git a/requirements.txt b/requirements.txt
index 6f0a26f..3ce5788 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ kiwisolver==1.1.0
 Markdown==3.2.1
 MarkupSafe==1.1.1
 matplotlib==3.2.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.15
 mkl-random==1.1.0
 mkl-service==2.3.0