Z:gnu-www-ja-gpl-faq--102569-Suppose a program says =26ldquo;/en

Suppose a program says &ldquo;Version 3 of the GPL or any later version&rdquo; and a new version of the GPL is released. If the new GPL version gives additional permission, that permission will be available immediately to all the users of the program. But if the new GPL version has a tighter requirement, it will not restrict use of the current version of the program, because it can still be used under GPL version 3. When a program says &ldquo;Version 3 of the GPL or any later version&rdquo;, users will always be permitted to use it, and even change it, according to the terms of GPL version 3&mdash;even after later versions of the GPL are available.