diff --git a/requirements.txt b/requirements.txt
index ecbd774..01652b5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ kiwisolver==1.1.0
 locket==0.2.0
 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