diff --git a/requirements.txt b/requirements.txt
index 1386f19..58c3815 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ jupyter-core==4.6.0
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 nb-conda-kernels==2.2.2
 nbconvert==5.6.0