Press Releases

Jupiter, FL–(June 17, 2009–BUSINESS WIRE)—Dyadic International, Inc. (“Dyadic”)(Pink Sheets: DYAI) today announced that the Audit Committee of its Board of Directors has appointed Goldstein Lewin & Co. (“Goldstein Lewin”) as Dyadic’s independent registered public accounting firm for the fiscal year ending December 31, 2009.

Goldstein Lewin is currently reviewing Dyadic’s results for the first and second quarters of 2009 and also conducting an audit of Dyadic for the fiscal years ended December 31, 2008 and 2007. Upon completion, Dyadic intends to make these and all future financial statements publicly available on its website ( www.dyadic.com) and through the Pink Sheets Disclosure and News Service ( www.pinksheets.com).

Goldstein Lewin has been an integral part of the South Florida community for over 30 years. Goldstein Lewin has over 85 employees and is the 25th largest accounting firm in Florida. Goldstein Lewin is also a member of PKF International, a global network of accounting and business advisors with representation in 120 different countries.

“We believe that Goldstein Lewin has the skills necessary to meet our business requirements and look forward to working with them to provide timely and accurate financial information which will benefit our stockholders and increase the visibility and credibility of Dyadic in the investment community,” stated Dyadic’s Chairman and CEO, Mark Emalfarb.

ABOUT DYADIC

Dyadic International, Inc. is a global biotechnology company that uses its patented and proprietary technologies to conduct research and development activities for the discovery, development, and manufacture of products and enabling solutions to the bioenergy, industrial enzyme and pharmaceutical industries. Visit Dyadic’s website atwww.dyadic.com.

CAUTIONARY STATEMENT FOR FORWARD-LOOKING STATEMENTS

Certain statements contained in this press release are forward- looking statements. These forward-looking statements involve risks and uncertainties that could cause Dyadic’s actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Except as required by law, Dyadic expressly disclaims any intent or obligation to update any forward-looking statements.

CONTACT:

Dyadic International, Inc.

Adam J. Morgan

Phone: 561-743-8333

Email: amorgan@dyadic.com