I'm using BibLaTeX for my bibliography, with the the following options:

\usepackage[backend=bibtex8, citestyle=numeric, defernumbers=true, bibstyle=numeric, autocite=superscript]{biblatex}

I would like to know how I could use roman numerals instead of arabic numerals for enumerating bibliography entries. I have already found that question, but the answer doesn't entirely suit my needs.

What I want is something like this:

Some text. [I]


[I] The corresponding reference.

Instead of this:

Some text. [1]


[1] The corresponding reference.

Thanks in advance!

1 Answer 1


It should be enough to have


for lowercase numerals, or


for uppercase numerals.

If a shorthand is present it is used instead of a number, but still the labelnumber format seems to apply, so something like


is a bit safer.






picture of MWE output

Since biblatex version 3.1 and more specifically commit e5c2826 the fix previously contained in this answer is obsolete; it has been removed (but can be of course be found in the revision history).

  • I have added a bug report (#342) about the labelnumberwidth calculation.
    – moewe
    Oct 7, 2015 at 6:53
  • 2
    Thanks to @moewe for the bug report - this width issue will be fixed in the next biblatex release.
    – PLK
    Oct 10, 2015 at 13:22

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