Consent of
Independent Registered Public Accounting
Firm
We consent to the incorporation
by reference in the Registration Statement on Form S-8 of Denison
Mines Corp. of our report dated March 8, 2018 relating to the
consolidated financial statements and the effectiveness of internal
control over financial reporting, which is filed as an exhibit to
Denison Mines Corp.'s Annual Report on Form 40-F for the year ended
December 31, 2017.
/s/ PricewaterhouseCoopers
LLP
Toronto,
Canada
May 3, 2018