Absolutely!

For Web App users:

Simply log in to your Account > "Investments" > "More option" tab > click on "Edit portfolio".

Make changes to the portfolio as you wish by moving the slider and finally, click on "Confirm" to update the portfolio.

For Mobile App users: 
Simply log in to your Account, select a portfolio that you would like to make amendments to > click the "3 vertical dots" on your top right corner of the screen > select "Adjust risk".

Make changes to the portfolio as you wish by moving the slider and finally, click on "Confirm" to update the portfolio.