Doesn't update minified file on re-compiling.

[strawberry-choco]

After changing some code in my Javascript file and re-compiling the code, the minified version of it does not get updated even though the debug version does.
My gulp-file:

var minify = require('gulp-minify');
gulp.task('jsCompress', function() {
  return gulp.src('./js/*.js')
    .pipe(minify({
      ext: {
        src: '.debug.js',
        min: '.min.js'
      },
      mangle: false,
      compress: false,
      ignoreFiles: ['.combo.js', '*.min.js', '*.debug.js']
    }))
    .pipe(gulp.dest('./js')) //same directory as the source directory
});
gulp.task('default', ['jsCompress']);