Browserify Module not found

I am trying to use the 'typestring' npm module with browserify but get the following error in the Chrome console:

Uncaught Error: Cannot find module 'typescript-api' 

I see that 'typescript-api' is a dependency of typestring and it does appear in the node_modules folder of 'typestring'...

Am i missing something? My grunt-browserify task is:

browserify: {
        dist: {
            files: {
                './public/bundle.js': './public/main.js'
            },
            options: {
                commondir: true,
                bundleOptions: {
                    debug: true
                },
                transform: ['deamdify']
            }
        }
    },