diff --git a/docs/requirements.txt b/docs/requirements.txt
index 0f408e4..2105f52 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -9,7 +9,7 @@ imagesize==1.1.0
 Jinja2==2.11.3
 m2r==0.2.1
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 packaging==19.1
 Pygments==2.7.4
 pyparsing==2.4.2