diff --git a/requirements.txt b/requirements.txt
index 52de3fc..39d41b6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ jupyter-core==4.6.3
 kiwisolver==1.2.0
 MarkupSafe==1.1.1
 matplotlib==3.1.3
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.15
 mkl-random==1.1.0
 mkl-service==2.3.0