diff --git a/ch09/myproject_virtualenv/src/django-myproject/requirements/_base.txt b/ch09/myproject_virtualenv/src/django-myproject/requirements/_base.txt
index e99ae8f..abb7012 100644
--- a/ch09/myproject_virtualenv/src/django-myproject/requirements/_base.txt
+++ b/ch09/myproject_virtualenv/src/django-myproject/requirements/_base.txt
@@ -1,5 +1,5 @@
 asgiref==3.2.3
-certifi==2019.11.28
+certifi==2022.12.7
 chardet==3.0.4
 coverage==4.5.3
 defusedxml==0.6.0