diff --git a/requirements.txt b/requirements.txt
index 458da5b..79cabaf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ jupyter-core==4.6.1
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.14
 mkl-random==1.1.0
 mkl-service==2.3.0