diff --git a/install_sympa.sh b/install_sympa.sh
index a85161f..6d8ee6c 100755
--- a/install_sympa.sh
+++ b/install_sympa.sh
@@ -100,6 +100,7 @@ _needed_cpan_modules="
    MIME::Tools
    Mail::Address
    Net::CIDR
+   Net::DNS
    Sys::Syslog
    Template
    Term::ProgressBar