Replacing Special Characters in XML PO Output (& to &amp)

Dear Experts,

We have configured SRM for XML output and transfer to vendor via PI though HTTP post.

However our XML has special characters in it for example & in the following tag:

<StreetName>100 Main Street & Commercial Drive</StreetName>

What we need to send is the following:

<StreetName>100 Main Street &amp Commercial Drive</StreetName>

Has anyone run into this issue before?