Composer error

[devloe]

I'm using Laravel 4.2.*. After adding "baum/baum": "1.0.15", I get:

Problem 1

• Conclusion: don't install phpseclib/phpseclib 0.3.10
• Conclusion: don't install phpseclib/phpseclib 0.3.9
• Conclusion: don't install phpseclib/phpseclib 0.3.8
• Conclusion: don't install phpseclib/phpseclib 0.3.7
• Conclusion: don't install phpseclib/phpseclib 0.3.6
• Conclusion: don't install phpseclib/phpseclib 0.3.5
• Conclusion: don't install phpseclib/phpseclib 0.3.1
• Can only install one of: phpseclib/phpseclib[0.3.0, dev-master].
• Can only install one of: phpseclib/phpseclib[dev-master, 0.3.0].
• Installation request for phpseclib/phpseclib 0.3.*@dev -> satisfiable by phpseclib/phpseclib[0.3.0, 0.3.1, 0.3.10, 0.3.5, 0.3.6, 0.3.7, 0.3.8, 0.3.9].
• Installation request for phpseclib/phpseclib == 9999999-dev -> satisfiable by phpseclib/phpseclib[dev-master].

Any toughts?

None of the tag versions does work, I always get the error.