diff --git a/cd.sh b/cd.sh
index 68e37a4..a4cf213 100644
--- a/cd.sh
+++ b/cd.sh
@@ -99,14 +99,21 @@ Acquire::https::Verify-Peer False;
     esac
 }
 
+function cd_update_packages_catalog {
+    cd_step "${FUNCNAME}"
+    case "${CD_OS_NAME}" in
+        'debian') apt-get update ;;
+        *) exit 1 ;;
+    esac
+}
+
 function cd_main {
     cd_set_dns_resolving
     cd_set_packages_repositories
     cd_set_packages_configuration
+    cd_set_https_verification_off
+    cd_update_packages_catalog
 
-cd_step "update package catalog"
-apt-get update \
-|| exit
 cd_step "install CA certificates package"
 apt-get install --yes 'ca-certificates' \
 || exit