use https links where possible
diff --git a/NOTICE.txt b/NOTICE.txt
index 68f91d9..3fbe821 100644
--- a/NOTICE.txt
+++ b/NOTICE.txt
@@ -2,7 +2,7 @@
 Copyright 2002-2018 The Apache Software Foundation
 
 This product includes software developed at
-The Apache Software Foundation (http://www.apache.org/).
+The Apache Software Foundation (https://www.apache.org/).
 
 The files in the package org.apache.commons.compress.archivers.sevenz
 were derived from the LZMA SDK, version 9.20 (C/ and CPP/7zip/),