UW–⁠Madison Information Technology
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Update your Duo Mobile app by March 31

Posted by Nick Heynen on March 17, 2026

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All UW–‍Madison students and employees must update their Duo Mobile app by March 31. After that date, older versions of the app will no longer work.

Update your mobile app today to keep your access to essential university systems — including your email, Canvas courses, Zoom meetings, timesheets, payroll and more.

What is happening: Duo Security will stop supporting older versions of its mobile app after March 31 to improve security. After that, older app versions will stop working for multifactor authentication.

Update your Duo Mobile app

  1. Open the App Store (iPhone/iPad) or Play Store (Android)
  2. Search for “Duo Mobile”
  3. Update the app
    1. iPhone or iPad: Tap the download icon next to Duo Mobile
    2. Android: Tap Update next to Duo Mobile
  4. Wait for the update to download and install
  5. Open the app to confirm it works

Download Duo Mobile for iOS & iPadOS Download Duo Mobile for Android

If you cannot update the app

Your phone’s operating system may be too old. The Duo Mobile app requires:

  • iPhone & iPad: iOS 16 or newer
  • Android: Android 12 or newer

How to check your operating system version:

  • iPhone: Go to Settings, then General, then About, then iOS Version
  • Android: Go to Settings, then About Phone, then Android Version

If your phone is too old to update

You have three options:

  1. Use a different phone or tablet that meets the requirements above
  2. Create backup passcodes before March 31 (Instructions for creating backup passcodes)
  3. Request a Duo security key fob from your Human Resources office, your IT department or from the DoIT Help Desk

How to get help

Contact the DoIT Help Desk:

Request translation support in Spanish, Hmong, Tibetan, Mandarin Chinese or Nepali:

Duo Mobile app menu on iPhone with version number 4.103.0.1436.1 highlighted at the bottom
Your Duo Mobile app version number must be 4.85.0 or higher to continue working after March 31, 2026.

Frequently asked questions

Why is this happening? Duo is ending support for older versions to improve security. Outdated versions will stop receiving security updates.

What happens if I do not update? After March 31, you will not be able to log in to university systems that require multifactor authentication. You will need to use backup passcodes or a Duo security key fob instead.

How do I check my app version?

  1. Open the Duo Mobile app on your mobile device
  2. Tap the menu icon (three horizontal lines) in the top-left corner
  3. The app version will be displayed in the bottom left corner
  4. If it shows a version earlier than 4.85.0, update now

Note: Version numbers can be tricky. The number 4.104.0 is newer than 4.85.0 because you compare each section separately (4 = 4, then 104 > 85).

Can I keep using my current phone? Yes, if your device can run at a minimum iOS 16.0 or Android 12. If not, use a different device or an alternative authentication method.

What do I do after I update the app? Nothing. You are ready to go.