diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 319f5a3..273d8f9
--- a/requirements.txt
+++ b/requirements.txt
@@ -137,7 +137,7 @@ lz4==2.2.1
 Markdown==3.0.1
 MarkupSafe==1.1.0
 matplotlib==3.0.2
-mistune==0.8.4
+mistune==2.0.3
 mock==3.0.5
 more-itertools==4.3.0
 msgpack==0.5.6