I140 application sent with old fee a day before fee increased

[vans_ashi]

Hello,

My I140 application in PP sent on December 22nd, 2016 and received  next day by USCIS . On December 23, 2016 the fee for I140  increased.

I have not yet received the receipt notice.

I am confused what is going to happen in my case.

As per USCIS page,

"This chart lists USCIS' fees effective December 23, 2016. Applications and petitions postmarked or filed on or after December 23, 2016, must include these new fees or USCIS will reject your submission.   

Filing fees increased for most forms, and we published updated versions of the forms at uscis.gov/forms. We strongly encourage customers to download and submit these new versions, which are updated with the new fees and have an edition date of 12/23/16. We will accept prior versions of forms, with the exception of Form N-400, until February 21, 2017. However, all filings postmarked December 23, 2016, or later must include the new fees or we will reject them."

Any help is highly appreciated!!!