diff --git a/break_utility/requirements.txt b/break_utility/requirements.txt
index a3bf729..38da388 100644
--- a/break_utility/requirements.txt
+++ b/break_utility/requirements.txt
@@ -58,7 +58,7 @@ kiwisolver==1.1.0
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.15
 mkl-random==1.1.0
 mkl-service==2.3.0