diff --git a/requirements.txt b/requirements.txt
index a64ee14..916c606 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ lifelines==0.14.6
 Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==2.2.3
-mistune==0.8.3
+mistune==2.0.3
 mkl-fft==1.0.4
 mkl-random==1.0.1
 nb-anacondacloud==1.4.0