Exhibit 32.3

Certification of CEO and CFO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Annual Report on Form 10-K of Westar Energy, Inc. (the "Company") for the annual period ended December 31, 2018, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), Terry Bassham, as President and Chief Executive Officer of the Company, and Anthony D. Somma, as Executive Vice President and Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	/s/ Terry Bassham
Name: Title:	Terry Bassham President and Chief Executive Officer
Date:	February 21, 2019
	/s/ Anthony D. Somma
Name: Title:	Anthony D. Somma Executive Vice President and Chief Financial Officer
Date:	February 21, 2019