diff --git a/requirements.txt b/requirements.txt
index 64213a0..bacae18 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ keyring==18.0.0
 lazy-object-proxy==1.4.2
 MarkupSafe==1.1.1
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft
 mkl-random
 nbconvert==5.6.0