diff --git a/.env.example b/.env.example
index 427f84781..072798731 100644
--- a/.env.example
+++ b/.env.example
@@ -25,7 +25,7 @@ MAX_ALBUM_LENGTH="4"
 APP_URL="http://localhost"
 APP_DOMAIN="localhost"
 ADMIN_DOMAIN="localhost"
-SESSION_DOMAIN="localhost"
+SESSION_DOMAIN=null # Keep as null unless required for sharing session cookies with subdomains like SSO
 TRUST_PROXIES="*"
 
 # Database Configuration