DACPAC drops existing users and permissions from database when upgrading through SSMS

I'm developing my database through a database project in visual studio, and whenever I need to upgrade the schema of my database I like to use SSMS to do this using a DACPAC. But whenever I use my DACPAC to upgrade the schema of my database, then the current existing Security Users and permissions for these users are being dropped. And I need them to remain in the database. Is there anyway to configure the DACPAC to not drop users and their permissions whenever I upgrade my database using "Upgrade Data-tier Application" in SSMS? Thanks in advance.