What type of hybridization does phosphorus have in P2O5?

I'm inclined to think that P has a $dsp$ hybridization in that compound, because it makes 5 bonds and 2 of them are $\pi$ bonds - with oxygen. However, I found in some websites that it may have $sp^2$ hybridization, although I have no idea how could it be possible - since it has to make two $\pi$ and 3 sigma bonds.


