diff --git a/security.txt b/security.txt
index 1624a69cfe..2a775e4b38 100644
--- a/security.txt
+++ b/security.txt
@@ -1,6 +1,6 @@
 Contact: mailto:info@friendi.ca
 
-Expires: Sun, 31 Dec 2023 23:59 +0000
+Expires: 2023-12-31T23:59:59Z
 
 Preferred-Languages: en