diff --git a/docs/requirements.txt b/docs/requirements.txt
index 61dc91e..c2177a2 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -37,7 +37,7 @@ kiwisolver==1.0.1
 m2r==0.2.1
 markupsafe==1.1.1
 matplotlib==3.0.3
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.0.0
 nbconvert==5.4.1
 nbformat==4.4.0