diff --git a/requirements.txt b/requirements.txt
index 384e664..82c3796 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ kiwisolver==1.0.1
 line-profiler==2.1.2
 MarkupSafe==1.0
 matplotlib==2.2.3
-mistune==0.8.3
+mistune==2.0.3
 mkl-fft==1.0.4
 mkl-random==1.0.1
 nb-anacondacloud==1.4.0