diff --git a/requirements.txt b/requirements.txt
index a5e48c3..813538f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ astropy-healpix==0.5
 attrs==19.3.0
 basemap==1.2.1
 boto==2.49.0
-certifi==2019.11.28
+certifi==2022.12.7
 cffi==1.14.0
 chardet==3.0.4
 click==7.1.1