diff --git a/pip-sample/requirements.txt b/pip-sample/requirements.txt
index 74d37475..73f53326 100644
--- a/pip-sample/requirements.txt
+++ b/pip-sample/requirements.txt
@@ -27,7 +27,7 @@ jupyter-core==4.4.0
 kiwisolver==1.0.1
 MarkupSafe==1.0
 matplotlib==2.2.2
-mistune==0.8.3
+mistune==2.0.3
 nbconvert==5.4.0
 nbformat==4.4.0
 nltk==3.3