diff --git a/requirements.txt b/requirements.txt
index 301dbfa..4a65d7a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ Keras-Applications==1.0.6
 Keras-Preprocessing==1.0.5
 Markdown==3.0.1
 MarkupSafe==1.1.0
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.6
 mkl-random==1.0.1
 more-itertools==6.0.0