git: ignore committed file to be ignored for sending in Merge request (gitlab)?

Question

I'll explain the scenario below:

There are two branches master and dev in gitlab. The file structure is as follows

project
  |-- package.json
  |-- other-files...

I've created a feature branch (myfeature) from master and version in master is 0.1.0b1.

Now I've to send merge request to dev branch in which package.json version is 0.1.1a1. I don't want to replace the version with beta in dev.

Is there some way to send merge request ignoring package.json?