illegal base32 data could be lower case
so documenting it should be upper case to prevent people wondering why converting zu base32 doesnt help
@@ -177,7 +177,7 @@ secret1234
totp: ABC123
```
-*Note: any values for `totp:` need to be base32 (32, not 64) encoded. Often sites will display the raw secret alongside the QR*
+*Note: any values for `totp:` need to be base32 (32, not 64 and uppercase letters only) encoded. Often sites will display the raw secret alongside the QR*
Some sites will not directly show you the URL contained in the QR code. If this is the case, you can use something like [zbar](http://zbar.sourceforge.net/) to extract the URL.
