+## Upgrade
+
+### General procedure for all versions
+
+1. Backup your Jirafeau installation!
+2. Block access to Jirafeau
+3. Checkout the new version with Git using the [tagged release](https://gitlab.com/mojo42/Jirafeau/tags)
+ * If you have installed Jirafeau just by uploading files on your server, you can download the desired version, overwrite/remove all files and chown/chmod files if needed. Keep a backup of your local configuration file tough.
+4. With you browser, go to your Jirafeau root page
+5. Follow the installation wizard, it should propose you the same data folder or even update automatically
+7. Check your ```/lib/config.local.php``` and compare it with the ```/lib/config.original.php``` to see if new configuration items are available
+
+### From version 1.0 to 1.1
+
+1. The download URL changed
+ * Add a rewrite rule in your web server configuration to rename ```file.php``` to ```f.php``` to make older, still existing links work again
+1. The default skin changed
+ * Optionally change the skin in ```lib/config.local.php``` to »courgette«
+
+### From version 1.2.0 to 2.0.0
+
+1. The "Terms of Service" text file changed
+ * To reuse previous changes to the ToS, move the old ```/tos_text.php``` file to ```/lib/tos.local.txt``` and remove all HTML und PHP Tags, leaving a regular text file
+
+### From version 2.0.0 to 3.0.0
+
+1. No special change to upgrade to 3.0.0
+
+### Troubleshooting
+
+If you have some troubles, consider the following cases
+
+- Check your ```/lib/config.local.php``` file and compare it with ```/lib/config.original.php```, the configuration syntax or a parameter may have changed
+- Check owner & permissions of your files
+
+## Security