Exhibit 23.1 

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Prospectus constituting a part of this Registration Statement of our report dated March 16, 2020 (which includes an explanatory paragraph relating to the Hennessy Capital Acquisition Corp. IV’s ability to continue as a going concern), relating to the financial statements of Hennessy Capital Acquisition Corp. IV appearing in the entity’s Annual Report on Form 10-K for the year ended December 31, 2019.