diff --git a/common/environment/setup/misc.sh b/common/environment/setup/misc.sh
index e0d97779936..efa36e18589 100644
--- a/common/environment/setup/misc.sh
+++ b/common/environment/setup/misc.sh
@@ -13,7 +13,7 @@ GNOME_SITE="http://ftp.gnome.org/pub/GNOME/sources"
 KERNEL_SITE="https://www.kernel.org/pub/linux"
 CPAN_SITE="https://www.cpan.org/modules/by-module"
 PYPI_SITE="https://files.pythonhosted.org/packages/source"
-MOZILLA_SITE="http://ftp.mozilla.org/pub"
+MOZILLA_SITE="https://ftp.mozilla.org/pub"
 GNU_SITE="http://ftp.gnu.org/gnu"
 FREEDESKTOP_SITE="https://freedesktop.org/software"
 KDE_SITE="https://download.kde.org/stable"