SECURITY DEVICES INTERNATIONAL

PRESS RELEASE

TORONTO, August 16, 2013

Security Devices International Inc. Files Amended and Restated Prospectus for Initial Public Offering

Security Devices International Inc. (“SDI”), a defense technology company specializing in the development of innovative, next generation non-lethal ammunition, announced today, further to its prior news release of July 8, 2013, it has filed an amended and restated final long form prospectus (the “Prospectus”) with the securities regulatory authorities in Ontario, British Columbia and Alberta in connection with a proposed initial public offering (the “Offering”) of a minimum of 7,500,000 common shares (each, a “Common Share”) up to a maximum of 10,350,000 Common Shares at a price of $0.40 per Common Share for gross proceeds of a minimum of $3,000,000 up to a maximum of $4,140,000, with no over-allotment option, through Macquarie Private Wealth Inc. The Offering is expected to close on or about August 27, 2013.

This press release is for information purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any securities of SDI in any jurisdiction.

About Security Devices International Inc.

Security Devices International Inc. (“SDI” or “The Company”) is a defense technology company specializing in the development of innovative, next generation non-lethal ammunition. SDI is currently in the market-entry stage of deploying their family of non-lethal ammunition to global militaries, law enforcement and correctional agencies.