Moneris Hosted Tokenization, how to get label to display apostrophe?

Similar to this question https://community.moneris.com/product-forums/f/6/t/312

I need to display an apostrophe in the label for example:

<label for="monerisExpInput", class="monerisInputLabel" id="monerisExpLabel">Date d_expiration (Format - MMAA)</label>

But despite what I send in the request, including this:

&exp_label=Date+d%27expiration+(Format+-+MMAA)

I get:

Date d_expiration (Format - MMAA)


Any assistance would be appreciated, thank you.