diff --git a/requirements.txt b/requirements.txt
index 3acd0c8..fbf7d4f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ lxml==4.3.4
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft
 mkl-random
 nbconvert==5.5.0