diff --git a/swifr_pkg/requirements.txt b/swifr_pkg/requirements.txt
index 3e2d876..5844e15 100644
--- a/swifr_pkg/requirements.txt
+++ b/swifr_pkg/requirements.txt
@@ -88,7 +88,7 @@ lxml==4.2.5
 MarkupSafe==1.1.0
 matplotlib==3.0.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.6
 mkl-random==1.0.2
 more-itertools==4.3.0