# [Tails 6.4](https://tails.net/news/version_6.4/index.en.html)
# New features ## Random seed Tails now stores a random seed on the USB stick to strengthen all cryptography. Having a [secure random number generator](https://en.wikipedia.org/wiki/cryptographically%20secure%20pseudorandom%20number%20generator) is critical to some of the cryptography used in Tails, for example, in the Persistent Storage, Tor, or HTTPS. This random seed is stored [outside of the Persistent Storage](https://tails.net/contribute/design/random/) so that all users can benefit from stronger cryptography. # Changes and updates * Switch to using HTTPS addresses instead of an onion addresses for the Debian and Tails APT repositories. This makes the [Additional Software](https://tails.net/doc/persistent_storage/additional_software/index.en.html) feature more reliable. * Update _Tor Browser_ to [13.0.16](https://blog.torproject.org/new-release-tor-browser-13016). * Update the _Tor_ client to 0.4.8.12. * Update _Thunderbird_ to [115.12.0](https://www.thunderbird.net/en-US/thunderbird/115.12.0/releasenotes/). # Fixed problems * Fix more issues when unlocking the Persistent Storage. ([#20020](https://gitlab.tails.boum.org/tails/tails/-/issues/20020), [#20344](https://gitlab.tails.boum.org/tails/tails/-/issues/20344), [#19913](https://gitlab.tails.boum.org/tails/tails/-/issues/19913)) * Fix connecting to a mobile broadband network on some hardware. ([#20291](https://gitlab.tails.boum.org/tails/tails/-/issues/20291)) * Enable again the PDF reader of _Thunderbird_ that we disabled in [Tails 6.3](https://tails.net/news/version_6.3/index.en.html) for security. * Improve the error message of _Tails Cloner_ when the target USB stick cannot be unmounted because it is being used. ([#19253](https://gitlab.tails.boum.org/tails/tails/-/issues/19253)) * Fix the homepage of _Tor Browser_ when using the New Identity feature. This removes the error message `Tor Browser blocked your homepage from loading`. ([#20381](https://gitlab.tails.boum.org/tails/tails/-/issues/20381)) * Remove the redundant dialog when unlocking a VeraCrypt volume using the _Unlock VeraCrypt Volumes_ utility. ([#20281](https://gitlab.tails.boum.org/tails/tails/-/issues/20281)) For more details, read our [changelog](https://gitlab.tails.boum.org/tails/tails/-/blob/master/debian/changelog). # Get Tails 6.4 ## To upgrade your Tails USB stick and keep your Persistent Storage * Automatic upgrades are available from Tails 6.0 or later to 6.4. You can [reduce the size of the download](https://tails.net/doc/upgrade/index.en.html#reduce) of future automatic upgrades by doing a manual upgrade to the latest version. * If you cannot do an automatic upgrade or if Tails fails to start after an automatic upgrade, please try to do a [manual upgrade](https://tails.net/doc/upgrade/index.en.html#manual). ## To install Tails 6.4 on a new USB stick Follow our installation instructions: * [Install from Windows](https://tails.net/install/windows/index.en.html) * [Install from macOS](https://tails.net/install/mac/index.en.html) * [Install from Linux](https://tails.net/install/linux/index.en.html) * [Install from Debian or Ubuntu using the command line and GnuPG](https://tails.net/install/expert/index.en.html) The Persistent Storage on the USB stick will be lost if you install instead of upgrading. ## To download only If you don't need installation or upgrade instructions, you can download Tails 6.4 directly: * [For USB sticks (USB image)](https://tails.net/install/download/index.en.html) * [For DVDs and virtual machines (ISO image)](https://tails.net/install/download-iso/index.en.html) URL: <https://tails.net/news/version_6.4/index.en.html>
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