Dependency conflict while installing the package

[Elhamne]

I'm trying to install gatsby-theme-gallery, but it fails with dependency conflict error.
My gatsby version is 3.2.1 but the plugin expected the version 2.13.25.

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! While resolving: [email protected]
npm ERR! Found: [email protected]
npm ERR! node_modules/gatsby
npm ERR!   gatsby@"^3.2.1" from the root project
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer gatsby@"^2.13.25" from [email protected]
npm ERR! node_modules/gatsby-theme-gallery
npm ERR!   gatsby-theme-gallery@"*" from the root project
npm ERR! 
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.

What can I do without downgrading?
Thanks