diff --git a/cd.sh b/cd.sh
index 67f33fa..316fe0e 100644
--- a/cd.sh
+++ b/cd.sh
@@ -106,19 +106,30 @@ function cd_update_packages_catalog {
     esac
 }
 
+function cd_install_ca {
+    cd_step "${FUNCNAME}"
+    case "${CD_OS_NAME}" in
+        'debian') apt-get install --yes 'ca-certificates' || exit ;;
+        *) exit 1 ;;
+    esac
+}
+
+function cd_set_https_verification_on {
+    cd_step "${FUNCNAME}"
+    case "${CD_OS_NAME}" in
+        'debian') rm '/etc/apt/apt.conf.d/https' ;;
+        *) 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 "install CA certificates package"
-apt-get install --yes 'ca-certificates' \
-|| exit
-cd_step "enable package verification"
-rm '/etc/apt/apt.conf.d/https' \
-|| exit
+    cd_install_ca
+    cd_set_https_verification_on
 
 cd_step "update package catalog"
 apt-get update \