diff --git a/HowtoDebian/SourcesList.md b/HowtoDebian/SourcesList.md
index 949c21f1..4e902739 100644
--- a/HowtoDebian/SourcesList.md
+++ b/HowtoDebian/SourcesList.md
@@ -21,12 +21,14 @@ Types: deb
 URIs: https://mirror.evolix.org/debian/
 Suites: bookworm bookworm-updates
 Components: main
+Signed-by: /usr/share/keyrings/debian-archive-bookworm-automatic.gpg
 
 # cat /etc/apt/sources.list.d/security.sources
 Types: deb
 URIs: https://security.debian.org/debian-security
 Suites: bookworm-security
 Components: main
+Signed-by: /usr/share/keyrings/debian-archive-bookworm-security-automatic.gpg
 
 # cat /etc/apt/sources.list.d/evolix_public.sources
 Types: deb