diff --git a/requirements.txt b/requirements.txt
index 1bfa825..8e3987a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ jupyter-core==4.4.0
 kiwisolver==1.0.1
 MarkupSafe==1.1.0
 matplotlib==3.0.2
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.6
 more-itertools==4.3.0
 nbconvert==5.4.0