diff --git a/req.txt b/req.txt
index 12c388a..7144be2 100644
--- a/req.txt
+++ b/req.txt
@@ -51,7 +51,7 @@ lazy-object-proxy==1.3.1
 MarkupSafe==1.0
 matplotlib==2.2.2
 mccabe==0.6.1
-mistune==0.8.3
+mistune==2.0.3
 mkl-fft==1.0.0
 mkl-random==1.0.1
 more-itertools==4.2.0