diff --git a/angle_01_week_02/nn-from-scratch-master/requirements.txt b/angle_01_week_02/nn-from-scratch-master/requirements.txt
index ecae77f..6f12c2c 100644
--- a/angle_01_week_02/nn-from-scratch-master/requirements.txt
+++ b/angle_01_week_02/nn-from-scratch-master/requirements.txt
@@ -17,7 +17,7 @@ jupyter-console==4.0.1
 jupyter-core==4.0.4
 MarkupSafe==0.23
 matplotlib==1.4.3
-mistune==0.7.1
+mistune==0.8.1
 mock==1.3.0
 nbconvert==4.0.0
 nbformat==4.0.0