Exhibit

We consent to the incorporation by reference in the registration statement on Form S-3 (No. 333-221559) and on Forms S-8 (No. 333-225579, No. 33-88640, No. 333-127598, No. 333-183191 and No. 333-205226) of W. R. Berkley Corporation of our reports dated February 22, 2019, with respect to the consolidated balance sheets of W. R. Berkley Corporation as of December 31, 2018 and 2017, the related consolidated statements of income, comprehensive income, stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2018, and the related notes (and financial statement schedules II to VI) (collectively, the “consolidated financial statements”), and the effectiveness of internal control over financial reporting as of December 31, 2018, which reports appear in the December 31, 2018 annual report on Form 10‑K of W. R. Berkley Corporation. Our report refers to a change in the method of accounting for equity investments measured at fair value with changes in the fair value recognized through net income (other than those accounted for under equity method of accounting or those that result in consolidation of the investee) effective January 1, 2018 due to the adoption of ASU 2016-01, Financial Instruments