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[[!meta title="Upgrading a Tails USB stick"]]
 
Tails includes an automatic mechanism to upgrade a USB stick to the latest version of Tails. When an automatic upgrade is performed, only an *upgrade package* is downloaded. The upgrade package contains all the changes made to Tails since Tails was first installed or was last manually upgraded.
 
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.
 
<p>Your Persistent Storage will be preserved by both automatic and
manual upgrades.</p>
 
If you use Tails from a DVD, you need to [[burn a new DVD|install/dvd]].
 
<h1 id="check-version">Checking which version of Tails you are currently running</h1>
 
To check which version of Tails you are currently running, choose
<span class="menuchoice">
<span class="guimenu">Applications</span>&nbsp;▸
<span class="guisubmenu">Tails</span>&nbsp;▸
<span class="guimenuitem">About Tails</span></span>.
Um die laufende Tails-Version herauszufinden, wählen Sie
<span class="menuchoice">
<span class="guimenu">Anwendungen</span>&nbsp;▸
<span class="guisubmenu">Tails</span>&nbsp;▸
<span class="guimenuitem">Über Tails</span>
</span>
<h1 id="automatic">Automatic upgrade using <i>Tails Upgrader</i></h1>
 
After starting Tails and connecting to Tor, <span class="application">Tails
Upgrader</span> automatically checks if upgrades are available and then
proposes you to upgrade your USB stick. The upgrades are checked for and downloaded
through Tor.
 
The advantages of automatic upgrades are the following:
 
You only need a single Tails USB stick. The upgrade is done on the fly from a running Tails. After upgrading, you can restart and use the new version.
 
- The upgrade is much smaller to download than a full USB image.
 
The upgrade mechanism includes cryptographic verification of the upgrade. You don't have to verify the USB image yourself anymore.
 
Requirements:
 
- A Tails USB stick
 
- An Internet connection
 
After connecting to Tor, if an upgrade is available, a dialog appears and proposes you to upgrade your USB stick.
 
[[!img upgrader_automatic.png link=no]]
 
If you decide to do the upgrade, click on <span
class="guilabel">Upgrade now</span>,
and follow the assistant through the upgrade process.
 
<p>If you cannot upgrade at startup (for example, if you have no network
connection by then), you can start <span class="application">Tails
Upgrader</span> later by opening a terminal and executing the following
command:</p>