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EXHIBIT 99.5

CEO CERTIFICATION UNDER SECTION 906 OF SARBANES-OXLEY

In connection with the annual report of Energy Fuels Inc. (the
Company) on Form 40-F for the period ended December 31, 2013 as filed with the
Securities and Exchange Commission on the date hereof (the Report), I, Stephen
P. Antony, President and Chief Executive Officer of the Company, certify,
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 my 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 this Report fairly presents,
      in all material respects, the financial condition and results of
      operations of the Company.

DATED this 28th day of March, 2014.

|       | /s/ Stephen P. Antony                       | 
|------ | ------------------------------------------- | 
|Name:  | Stephen P. Antony                           | 
|Title: | President and Chief Executive
      Officer | 

A signed original of this written statement required by Rule
13a-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350 has
been provided to the Registrant and will be retained by the Registrant and
furnished to the Securities and Exchange Commission or its staff upon request.

This certification accompanies the Form 40-F to which it
relates, is not deemed filed with the Securities and Exchange Commission and is
not to be incorporated by reference into any filing of the Registrant under the
Securities Act of 1933 or the Securities Exchange Act of 1934 (whether made
before or after the date of the Form 40-F), irrespective of any general
incorporation language contained in such filing.

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CFO CERTIFICATION UNDER SECTION 906 OF SARBANES-OXLEY

In connection with the annual report of Energy Fuels Inc. (the
Company) on Form 40-F for the period ended December 31, 2013 as filed with the
Securities and Exchange Commission on the date hereof (the Report), I, Daniel
G. Zang, Chief Financial Officer of the Company, certify, 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 my 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 this Report fairly presents,
      in all material respects, the financial condition and results of
      operations of the Company.

DATED this 28th day of March, 2014.

|       | /s/ DANIEL G. ZANG      | 
|------ | ----------------------- | 
|Name:  | Daniel G. Zang          | 
|Title: | Chief Financial Officer | 

A signed original of this written statement required by Rule
13a-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350 has
been provided to the Registrant and will be retained by the Registrant and
furnished to the Securities and Exchange Commission or its staff upon request.

This certification accompanies the Form 40-F to which it
relates, is not deemed filed with the Securities and Exchange Commission and is
not to be incorporated by reference into any filing of the Registrant under the
Securities Act of 1933 or the Securities Exchange Act of 1934 (whether made
before or after the date of the Form 40-F), irrespective of any general
incorporation language contained in such filing.

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