diff --git a/requirements.txt b/requirements.txt
index 499520a22..598a81d11 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ backcall==0.1.0
 black==19.10b0
 bleach==3.1.3
 branca==0.4.0
-certifi==2019.11.28
+certifi==2022.12.7
 cftime==1.1.1
 chardet==3.0.4
 click==7.1.1