diff --git a/requirements.txt b/requirements.txt
index c5ac5ae..6c1e35c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ backports.shutil-get-terminal-size==1.0.0
 backports.shutil-which==3.5.1
 bleach==2.1.3
 cachetools==2.1.0
-certifi==2018.4.16
+certifi==2022.12.7
 cftime==1.0.0
 cgen==2017.1
 CGS-parcels==1.0