diff --git a/defaults/main.yaml b/defaults/main.yaml
index 65697d4..48e866f 100644
--- a/defaults/main.yaml
+++ b/defaults/main.yaml
@@ -14,8 +14,8 @@ apt_repository_main: "https://archive.ubuntu.com/ubuntu"
 apt_repository_security: "https://archive.ubuntu.com/ubuntu"
 
 # debian repository url
-debian_repo_url_security: "https://security.debian.org/debian-security"
-debian_repo_url_update: "https://deb.debian.org/debian"
+debian_repo_url_security: "http://security.debian.org/debian-security"
+debian_repo_url_update: "http://deb.debian.org/debian"
 
 # firewall
 firewall_enable: true