diff --git a/requirements.txt b/requirements.txt
index 7d96359..13a63a3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ liac-arff==2.3
 Markdown==3.2.1
 MarkupSafe==1.1.1
 matplotlib==3.2.0
-mistune==0.8.4
+mistune==2.0.3
 mock==2.0.0
 mpi4py==3.0.0
 mpmath==1.0.0