[PROBLEM] SSH version used by Kodi/XBMC (SFTP nor working)

[psyLord]

Hey everyone,
I'm trying to connect my server to Kodi (using xbian) using SFTP. But I can't connect. I only can connect with HTTPS. But because of the character limit, I want to use SFTP.

I read somewhere that it's not working correctly, because Kodi is build with an older SSH version, and therefor the handshake doesn't work correct.

On the server:

Code:

ssh -V : OpenSSH_6.8p1, OpenSSL 1.0.1p 9 Jul 2015
openssl version : OpenSSL 1.0.1p 9 Jul 2015

On my raspberry pi running xbian (Kodi 14.2 Git:Unknown (Compiled: May 7 2015))

Code:

ssh -V : OpenSSH_6.0p1 Debian-4+deb7u2, OpenSSL 1.0.1e 11 Feb 2013
openssl version : OpenSSL 1.0.1e 11 Feb 2013

Can someone clarify this, please? And does there is a workaround to solve this problem? Is it a good idea to upgrade OpenSSH manually?

Thanks for any help.