diff --git a/requirements.txt b/requirements.txt
index 2b775d8..9b0a3d6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ jupyter-core==4.6.3; python_version >= '2.7' and python_version not in '3.0, 3.1
 jupyter==1.0.0

 llvmlite==0.34.0; python_version >= '3.6'

 markupsafe==1.1.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'

-mistune==0.8.4

+mistune==2.0.3

 nbconvert==5.6.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'

 nbformat==5.0.7; python_version >= '3.5'

 notebook==6.1.5; python_version >= '3.5'