diff --git a/src/annalist_root/requirements/common.txt b/src/annalist_root/requirements/common.txt
index 09325bc2..6c9c9f33 100644
--- a/src/annalist_root/requirements/common.txt
+++ b/src/annalist_root/requirements/common.txt
@@ -1,7 +1,7 @@
 # requirements/common.txt
 # See: http://www.deploydjango.com/django_project_structure/
 
-certifi==2021.10.8
+certifi==2022.12.7
 packaging==21.3
 six==1.16.0  
 Django==4.0.3