| CERTIFICATION PURSUANT TO |
| 18 U.S.C. §1350, |
| AS ADOPTED PURSUANT TO |
| SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 |
In connection with the Annual Report of HEXO Corp. (the "Company") on Form 40-F/A for the period ended July 31, 2019 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Sebastien St-Louis, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
| (1) | The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and |
| (2) | The information contained in this Report fairly presents, in all material respects, the financial condition and results of operations of the Company. |
| Date: October 31, 2019 | By: | /s/ Sebastien St-Louis |
| Sebastien St-Louis | ||
| President and Chief Executive Officer | ||
| (Principal Executive Officer) |
