Exhibit 99(g)(6)

December 15, 2023

State Street Bank and Trust Company

Channel Center

One Iron Street

Boston, Massachusetts 02210

Attention: Mark Branigan

Re: Appendix A to Master Custodian Agreement dated September 10, 2008 for JH Funds, and JH Funds III, JH ETF

Dear Mark:

Please be advised that John Hancock Exchange-Traded Fund Trust ( “JHETFT”) has established one (1) new series of shares to be known as:

John Hancock Disciplined Value International Select ETF

Please be advised that John Hancock Investment Trust (“JHIT”) has established one (1) new series of shares to be known as:

John Hancock Global Climate Action Fund

Please be advised that John Hancock Strategic Series (together with JHETFT and JHIT, collectively, the “Trusts”) has established one (1) new series of shares to be known as:

John Hancock Managed Account Shares Bond Completion Portfolio

In accordance with the Master Custodian Agreement dated as of September 10, 2008 (the “Agreement”) by and among each management investment company identified on Appendix A thereto and State Street Bank and Trust Company, the Trusts hereby requests that your bank act as Custodian for the aforementioned new series. In addition to the foregoing, Appendix A to the Agreement is hereby amended and restated as set forth on Appendix A attached hereto.

Kindly indicate your acceptance of the foregoing by executing this letter agreement, returning a copy to, John Hancock Funds, John Hancock Funds III, John Hancock Exchange-Traded Fund Trust, and John Hancock Asset-Based Lending Fund.

[THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]

Attachment

2

Appendix A

to the

MASTER CUSTODIAN AGREEMENT

dated September 10, 2008

Between

John Hancock Funds and

State Street Bank and Trust Company

Amended as of:

December 15, 2023

A-1

CONFIDENTIAL

A-2

A-3