diff --git a/requirements.txt b/requirements.txt
index 126a744..6254dba 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 astropy==3.2.3
-certifi==2019.11.28
+certifi==2022.12.7
 chardet==3.0.4
 cycler==0.10.0
 docutils==0.16