FIRST AMENDMENT TO LINE OF CREDIT AGREEMENT AND PROMISSORY NOTE

FIRST AMENDMENT TO

LINE OF CREDIT AGREEMENT AND PROMISSORY NOTE

THIS FIRST AMENDMENT TO LINE OF CREDIT AGREEMENT AND PROMISSORY NOTE (this “Amendment”) is entered into as of August 29, 2019, by and between Mount Tam Biotechnologies, Inc., a Nevada corporation (“Maker”), and Climate Change Investigation, Innovation and Investment Company, LLC, a California limited liability company (“Holder”).

RECITALS

A.Maker and Holder entered into that certain Line of Credit Agreement on May 10, 2019 (the “Loan Agreement”).

X.Xx connection with the Loan Agreement, Maker and Holder entered into that certain Promissory Note effective as of May 1, 2019 (the “Note”).

C.Maker and Holder have agreed to amend the Loan Agreement pursuant to Sections 5 and 8.5 thereof, pursuant to the terms set forth herein.

D.Maker and Holder have agreed to amend the Note pursuant to the terms thereof, pursuant to the terms set forth herein.

NOW THEREFORE, in consideration of the above recitals and other good and valuable consideration, the sufficiency and receipt of which are hereby acknowledged, the parties agree as follows:

1.The Loan Agreement is hereby amended by extending the Maturity Date thereof this one and final time only to October 31, 2019.

2.The Note is hereby amended by extending the Maturity Date thereof this one and final time only to October 31, 2019.

3.This Amendment supersedes any and all other provisions of the Loan Agreement and Note which are in conflict with this instrument.

4.This Amendment constitutes the full and complete agreement between the parties hereto. All other provisions of the Loan Agreement and Note not modified herein shall remain in full force and effect.

[Signature page follows]

IN WITNESS WHEREOF, the parties have executed this First Amendment to Line of Credit Agreement and Promissory Note effective as of the date set forth above.

MAKER:

Mount Tam Biotechnologies, Inc.

By:/s/ Xxxxxxx Xxxxxxx

Name:Xxxxxxx Xxxxxxx

Title:Chief Executive Officer

HOLDER:

Climate Change Investigation, Innovation and Investment Company, LLC

By:/s/ Xxxxx X. Xxxxxxx

Name:Xxxxx X. Xxxxxxx

Title: Manager