on behalf of John Hancock High Yield Municipal Bond Fund AMENDMENT TO SUB- ADVISORY AGREEMENT

Exhibit 99.(d)(4)

XXXX XXXXXXX MUNICIPAL SECURITIES TRUST

on behalf of Xxxx Xxxxxxx High Yield Municipal Bond Fund

AMENDMENT TO SUB-ADVISORY AGREEMENT

AMENDMENT made as of the 1st day of July, 2020 to the Sub-Advisory Agreement dated December 31, 2005, as amended (the “Agreement”), among Xxxx Xxxxxxx Investment Management LLC (formerly, Xxxx Xxxxxxx Advisers, LLC), a Delaware limited liability company, Manulife Investment Management (US) LLC (formerly, Xxxx Xxxxxxx Asset Management a division of Manulife Asset Management (US) LLC), a Delaware limited liability company, and each of the investment companies that is a signatory to the Agreement, including Xxxx Xxxxxxx Xxxx Trust. In consideration of the mutual covenants contained herein, the parties agree as follows:

1. SECTION 3 - COMPENSATION OF SUB-ADVISER AND APPENDIX A

Appendix A of the Agreement, which relates to Section 3 of the Agreement, “COMPENSATION OF SUB-ADVISER,” is hereby amended to reflect the following fee schedule for Xxxx Xxxxxxx High Yield Municipal Bond Fund, a series of Xxxx Xxxxxxx Municipal Securities Trust:

XXXX XXXXXXX MUNICIPAL SECURITIES TRUST

Portfolio	First $75 million of Daily Net Assets	Between $75 million and $150 million of Daily Net Assets	Between $150 million and $2 billion of Daily Net Assets	Between $2 billion and $4 billion of Daily Net Assets	Excess over $4 Billion of Daily Net Assets
Xxxx Xxxxxxx High Yield Municipal Bond Fund	[  ]%	[  ]%	[  ]%	[  ]%	[  ]%

2. EFFECTIVE DATE

This Amendment shall become effective as of the date first mentioned above.

3. DEFINED TERMS

Unless otherwise defined herein, capitalized terms used herein have the meanings specified in or pursuant to the Agreement.

4. OTHER TERMS OF THE AGREEMENT

Except as specifically amended hereby, all of the terms and conditions of the Agreement shall continue to be in full force and effect and shall be binding upon the parties in accordance with their respective terms.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed under seal by their duly authorized officers as of the date first mentioned above.

	XXXX XXXXXXX INVESTMENT MANAGEMENT LLC
	By:	/s/ Xxx Xxxxxxxxx
	Name:	Xxx Xxxxxxxxx
	Title:	Chief Investment Officer
	MANULIFE INVESTMENT MANAGEMENT (US) LLC
	By:	/s/ Xxxxx Xxxxxxx
	Name:	Xxxxx Xxxxxxx
	Title:	XX
	XXXX XXXXXXX MUNICIPAL SECURITIES TRUST,
	on behalf of Xxxx Xxxxxxx High Yield Municipal Bond Fund
	By:	/s/ Xxxxxx X. Xxxxxx
	Name:	Xxxxxx X. Xxxxxx
	Title:	President