diff --git a/requirements.txt b/requirements.txt
index 9a4fb0c..b2c522b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ lazy-object-proxy==1.4.1
 MarkupSafe==1.1.1
 matplotlib==3.1.0
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.6
 mkl-random==1.0.1
 nbconvert==5.5.0