Want to restrict merge option

[Prashant]

We have a 8-9 users in bitbucket who are in dev group apart from me who is the admin of it.

I want to restrict the commit(s) to master branch of the code i.e. nobody apart from me (admin) has an option to merge code in master branch.

I have tried Branch permission but it do not have my name in dropdown to have this right so I am left with either allow all or deny all (including me) to merge the code in master.