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In Mongolia, mining licence applications for its four license areas were submitted in 2011 and the Company is continuing to work to restructure the GSJV to meet the requirements of the Mongolian Nuclear Energy Law. In 2013, the Mongolian program is estimated at $1,700,000. The focus in 2013 will be on the ongoing restructuring efforts and the work necessary to obtain the mining licenses.

Qualified Person

The disclosure of scientific and technical information regarding Denison's properties in this press release was prepared by or reviewed by Steve Blower, P. Geo., the Company's Vice President, Exploration, and Terry Wetz, P.E., the Company's Vice President, Project Development, who are Qualified Persons in accordance with the requirements of NI 43-101.

Additional Information

Denison's consolidated financial statements for the year ended December 31, 2012 and related management's discussion and analysis are available on Denison's website at www.denisonmines.com or under its profile on SEDAR at www.sedar.com and on EDGAR at www.sec.gov/edgar.shtml.

About Denison

Denison Mines Corp. is a uranium exploration and development company with interests in exploration and development projects in Canada, Zambia and Mongolia. Including the world class Phoenix deposits, located on its 60% owned Wheeler River project, Denison's exploration project portfolio includes 32 projects and totals over 530,000 hectares in the Eastern Athabasca Basin region of Saskatchewan. Denison's interests in Saskatchewan also include a 22.5% ownership interest in the McClean Lake Joint Venture, which includes several uranium deposits and the McClean Lake uranium mill, one of the world's largest uranium processing facilities, and a 25.17% interest in the Midwest deposit, which is located 15 kilometres from the McClean Lake mill. Internationally, Denison owns 100% of the conventional heap leach Mutanga project, in Zambia, and an 85% interest in the in-situ recovery projects held by the Gurvan Saihan Joint Venture, in Mongolia.

Denison is engaged in mine decommissioning and environmental services through its Denison Environmental Services (DES) division and is the manager of Uranium Participation Corporation (TSX: U), a publicly traded company which invests in uranium oxide in concentrates and uranium hexafluoride.

Cautionary Statements

Certain information contained in this press release constitutes "forward looking information", within the meaning of the United States Private Securities Litigation Reform Act of 1995 and similar Canadian legislation concerning the business, operations and financial performance and condition of Denison.

Generally, these forward looking statements can be identified by the use of forward looking terminology such as "plans", "expects" or "does not expect", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates" or "does not anticipate", or "believes", or variations of such words and phrases or state that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur", "be achieved" or "has the potential to".

Forward looking statements are based on the opinions and estimates of management as of the date such statements are made, and they are subject to known and unknown risks, uncertainties and other factors that may cause the actual results, level of activity, performance or achievements of Denison to be materially different from those expressed or implied by such forward looking statements. Denison believes that the expectations reflected in this forward looking information are reasonable but no assurance can be given that these expectations will prove to be correct and such forward looking information included in this press release should not be unduly relied upon. This information speaks only as of the date of this press release. In particular, this press release may contain forward looking information pertaining to the following: the estimates of Denison's mineral reserves and resources; capital expenditure programs; expectations regarding the toll milling of Cigar Lake ores; exploration and development expenditures and reclamation costs; expectations of market prices and costs; supply and demand for uranium; possible impacts of litigation and regulatory actions on Denison; exploration, development and expansion plans and objectives; future royalty and tax payments and rates; Denison's expectations regarding raising capital and adding to its mineral reserves and resources through acquisitions and exploration; and receipt of regulatory approvals, permits and licences under governmental regulatory regimes.