diff --git a/requirements.txt b/requirements.txt
index 1d8b4ec..f55f1b8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ 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==5.0.0
 nbconvert==5.3.1