diff --git a/requirements.txt b/requirements.txt
index a9f6b86..da62ab2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -54,7 +54,7 @@ lxml==4.5.0
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.15
 mkl-random==1.1.0
 mkl-service==2.3.0