Exhibit 10.2

AMENDMENT NO. 3 TO

FIRST AMENDED AND RESTATED

REGISTRATION RIGHTS AGREEMENT

This Amendment No. 3, dated December 20, 2012 (this “Amendment”), to the First Amended and Restated Registration Rights Agreement dated as of August 8, 2011 (as amended from time to time, the “Agreement”), by and among PostRock Energy Corporation, a Delaware corporation (together with any successor entity thereto, the “Corporation”), White Deer Energy L.P., a Cayman Islands exempted limited partnership (“White Deer”), White Deer Energy TE L.P., a Cayman Islands exempted limited partnership (“White Deer TE”) and White Deer Energy FI L.P. a Cayman Islands exempted limited partnership (together with White Deer and White Deer TE, the “White Deer Stockholders”) and Constellation Energy Commodities Group, Inc., a Delaware corporation, is made by and among the Corporation and the White Deer Stockholders in accordance with Section 9(b) of the Agreement.

WHEREAS, pursuant to the Securities Purchase Agreement, dated as of the date hereof, by and among the Corporation and the White Deer Stockholders (the “December 2012 Purchase Agreement”) the Corporation issued and sold to the White Deer Stockholders and the White Deer Stockholders purchased from the Corporation 4,577,464 shares of Common Stock, 650 shares of Series A Shares and White Deer Warrants to purchase 4,577,464 shares of Common Stock; and

WHEREAS, to induce the White Deer Stockholders to enter into the December 2012 Purchase Agreement and to consummate the transactions contemplated therein, the Corporation agreed to provide the registration and other rights set forth in this Amendment for the benefit of the White Deer Stockholders.

NOW, THEREFORE, in consideration of the mutual terms, conditions and agreements contained herein, and of other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound hereby, the parties hereto hereby agree as follows:

each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement. Executed signature pages to this Amendment may be delivered by PDF (Portable Document Format) or facsimile and such PDFs or facsimiles will be deemed as sufficient as if actual signature pages had been delivered.

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IN WITNESS WHEREOF, the parties have executed this Amendment as of the date first above written.