diff --git a/docs/requirements.txt b/docs/requirements.txt
index c307982..525befa 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -32,7 +32,7 @@ lazy-object-proxy==1.3.1
 MarkupSafe==1.1.0
 matplotlib==3.0.2
 -e git+https://github.com/gregmedlock/Medusa.git@bc4a72f2e4f1ead9b845411e175a31c5019fa6e1#egg=medusa_cobra
-mistune==0.8.4
+mistune==2.0.3
 mpmath==1.0.0
 nbconvert==5.3.1
 nbformat==4.4.0