Updating the résumé should include

formatting the résumé so that it is suitable for online posting
presenting current, accurate, and effectively organized information
adhering to spelling, punctuation, and grammar rules
modifying the information to show the most recent activity and acquired skills and qualifications
following criteria related to electronic transmittal (e.g., attention to security concerns, inclusion of keywords to enhance interest in the application, use of scanner-friendly format)
ensuring employers encounter a professional email address, voicemail greeting, and ringtone when contacting the applicant.