diff --git a/requirements.txt b/requirements.txt
index 951926b..8191646 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ beautifulsoup4==4.8.2
 bleach==3.1.0
 bs4==0.0.1
 BTrees==4.6.1
-certifi==2019.11.28
+certifi==2022.12.7
 cffi==1.13.2
 cftime==1.0.4.2
 chardet==3.0.4