diff --git a/requirements.txt b/requirements.txt
index 9c317e6..fba03fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ lockfile==0.12.2
 Markdown==3.0.1
 MarkupSafe==1.1.0
 matplotlib==3.0.2
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.10
 mkl-random==1.0.2
 more-itertools==5.0.0