diff --git a/buildenv/1.3.x/win32-static/zlib.build b/buildenv/1.3.x/win32-static/zlib.build
index 4805f3ad..185eef30 100755
--- a/buildenv/1.3.x/win32-static/zlib.build
+++ b/buildenv/1.3.x/win32-static/zlib.build
@@ -1,11 +1,11 @@
 #!/usr/bin/env mumble-build
-# Copyright 2013-2014 The 'mumble-releng' Authors. All rights reserved.
+# Copyright 2013-2018 The 'mumble-releng' Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that
 # can be found in the LICENSE file in the source tree or at
 # <http://mumble.info/mumble-releng/LICENSE>.
 
 urls=(
-	"http://releng-distfiles.mumble.info/releng-distfiles/zlib-1.2.11.tar.gz"
+	"https://s3.amazonaws.com/mumble-releng-distfiles/zlib-1.2.11.tar.gz"
 	"http://zlib.net/zlib-1.2.11.tar.gz"
 )