diff --git a/sys-libs/zlib/zlib-1.2.13.recipe b/sys-libs/zlib/zlib-1.2.13.recipe
index d704d1517..40381a35f 100644
--- a/sys-libs/zlib/zlib-1.2.13.recipe
+++ b/sys-libs/zlib/zlib-1.2.13.recipe
@@ -13,7 +13,7 @@ HOMEPAGE="http://www.zlib.net/"
 COPYRIGHT="1995-2017 Jean-loup Gailly and Mark Adler"
 LICENSE="Zlib"
 REVISION="2"
-SOURCE_URI="http://zlib.net/zlib-$portVersion.tar.xz"
+SOURCE_URI="https://zlib.net/fossils/zlib-$portVersion.tar.xz"
 CHECKSUM_SHA256="d14c38e313afc35a9a8760dadf26042f51ea0f5d154b0630a31da0540107fb98"
 PATCHES="zlib-$portVersion.patchset"