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In some cases, it is impossible to do an **automatic upgrade** and you might have to do a **manual upgrade**. This page describes both techniques.
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If you use Tails from a DVD, you need to [[burn a new DVD|install/dvd]].
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To check which version of Tails you are currently running, choose **Apps ▸ Tails ▸ About Tails**.
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<h1 id="automatic">Automatic upgrade using <i>Tails Upgrader</i></h1>
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The advantages of automatic upgrades are the following:
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The upgrade is much smaller to download than a full USB image.
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The upgrade mechanism includes cryptographic verification of the upgrade. You don't have to verify the USB image yourself anymore.
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An Internet connection
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If you decide to do the upgrade, click on **Upgrade now**, and follow the assistant through the upgrade process.
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[[file:///usr/share/doc/tails/website/doc/upgrade/error/install.en.html|upgrade/error/install]]
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<h1 id="manual">Manual upgrade using <i>Tails Cloner</i></h1>
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It might not always be possible to do an automatic upgrade as described [[above|upgrade#automatic]]. For example, when:
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No automatic upgrade is available from our website for this version.
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[[Upgrade by cloning from another Tails|doc/upgrade/#clone]] (below)
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<h2 id="download">Download and upgrade</h2>
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[[Cloning from another Tails|upgrade/clone]]
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