diff --git a/requirements.txt b/requirements.txt
index 2988b84..0c4fd27 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ jupyter-core==4.3.0
 -e git+https://github.com/lyst/lightfm.git@27345ce68ec4d5e291c6303578f4fd0cdcac4c22#egg=lightfm
 MarkupSafe==1.0
 matplotlib==2.0.2
-mistune==0.8.1
+mistune==2.0.3
 nbconvert==5.3.1
 nbformat==4.4.0
 notebook>=5.7.2