diff --git a/proj1/requirements.txt b/proj1/requirements.txt
index e911f7c..c351b46 100644
--- a/proj1/requirements.txt
+++ b/proj1/requirements.txt
@@ -88,7 +88,7 @@ lxml==4.1.0
 MarkupSafe==1.0
 matplotlib==2.1.0
 mccabe==0.6.1
-mistune==0.7.4
+mistune==0.8.1
 mpmath==0.19
 msgpack-python==0.4.8
 multipledispatch==0.4.9