FIRST AMENDMENT TO REGISTRATION RIGHTS AGREEMENT

Exhibit 4.5

FIRST AMENDMENT TO REGISTRATION RIGHTS AGREEMENT

This FIRST AMENDMENT (this “Amendment”) to that certain Registration Rights Agreement, dated as of October 26, 2016 (the “Registration Rights Agreement”), by and among Lonestar Resources US Inc., a Delaware corporation (the “Company”), and EF Realisation Company Limited (the “Initial Holder”) is made and entered into as of June 14, 2017 by and among the Company and the Initial Holder. Capitalized terms used herein without definition shall have the meanings given to them in the Registration Rights Agreement.

RECITALS

WHEREAS, the Company and the Initial Holder entered into the Registration Rights Agreement, pursuant to which the Company granted the Initial Holder and each of their respective transferees and assigns registration and other rights;

WHEREAS, the Company desires to enter into additional Registration Rights Agreements (collectively, the “New Registration Rights Agreements”) with (i) Battlecat Oil & Gas, LLC (“Battlecat”), (ii) SN Marquis LLC (“Marquis”) and (iii) Chambers Energy Management, LP (together with Battlecat and Marquis, the “New Holders”) to grant the New Holders registration rights for certain registration rights;

WHEREAS, pursuant to Section 3.11 of the Registration Rights Agreement, the Company and the Initial Holder as signatories hereto, who together own a majority of the currently outstanding Registrable Securities, wish to amend the Registration Rights Agreement on the terms and conditions set forth herein.

NOW, THEREFORE, in consideration of the respective covenants, representations and warranties herein contained, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound hereby, the parties agree as follows:

“Battlecat Agreement” the registration rights agreement to be entered into by the Company and Battlecat Oil & Gas, LLC.

“Chambers Agreement” the registration rights agreement to be entered into by the Company and Chambers Energy Management, LP.

“Marquis Agreement” the registration rights agreement to be entered into by the Company and SN Marquis LLC.

“Specified Registration Rights Agreements” means, collectively, the Battlecat Agreement, the Chambers Agreement and the Marquis Agreement.”

“Except for the Specified Registration Rights Agreements, from and after the date hereof, the Company shall not enter into any agreement with any current or future holder of any securities of the Company that would allow such current or future holder to require the Company to include securities in any Registration Statement on a basis other than expressly subordinate to the rights of, the Holders of Registrable Securities hereunder.”

[Signature pages follow]

IN WITNESS WHEREOF, the parties have executed this Amendment as of June 14, 2017.

[Signature Page to Amendment to Registration Rights Agreement]

[Signature Page to Amendment to Registration Rights Agreement]