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Endeavour Silver Files Amended Terronera Technical Report

Technical Reports (NI 43-101)

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Endeavour Silver Files Amended Terronera Technical Report

Vancouver, Canada – May 31, 2023 - Endeavour Silver Corp. (“Endeavour” or the “Company”)

(NYSE: EXK; TSX: EDR) announces that it has filed an amended technical report titled “ NI 43-101

Technical Report of the Feasibility Study of the Terronera Project, Jalisco State Mexico - Amended” dated

May 15, 2023, with an effective date of September 9, 2021 in respect of the Company’s Terronera project

(the “Amended Terronera Report”). The Amended Terronera Report addresses comments raised by the

British Columbia Securities Commission in the course of a pre-filing review conducted by the BCSC at the

Company’s request.

The Amended Terronera Report amends the technical report titled “ NI 43-101 Technical Report on the

Feasibility Study of t he Terronera Project, Ja lisco State, Mexico ” dated October 21, 2021 and effective

September 9, 2021 (the “Original Terronera Report”) and contains no material differences to the Original

Terronera Report filed on October 25, 2021. A summary of the scientific and technical information contained

in the Original Terronera Report can be found in the Company’s news release dated September 9, 2021.

Two of the eight qualified persons wh o had prepared the Original Terronera Report were replaced by two

new qualified persons.

A copy of the Amended Terronera Techni cal Report is available on SEDAR ( www.sedar.com) and the

Company’s website (www.edrsilver.com), and is prepared in accordance with National Instrument 43-101

Standards for Disclosure for Mineral Projects.

Mr. Dale Mah, P. Geo, Vice President, Corporate Development of Endeavour, is the qualified person who

has reviewed and approved the contents of this release.

About Endeavour Silver – Endeavour is a mid-tier precious me tals mining company that operates two

high-grade underground silver-gold mines in Mexico. Endeavour is currently advancing construction of the

Terronera project and exploring its portfolio of expl oration and development projects in Mexico, Chile and

the United States to facilitate its goal to become a premier senior si lver producer. Our philosophy of

corporate social integrity creates value for all stakeholders.

For Further Information, Please Contact:

Galina Meleger, Vice President, Investor Relations

Tel: 604-640-4804

Email: [email protected]

Website: www.edrsilver.com

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