[Tex/LaTex] Bring enumerate back to numbering default

#enumeratelists

I'm using a nested list, where the outer items should be with numerals and the inner ones with numbers. I'm trying this with the package enumerate:

\begin{enumerate}[I]
    \item numeral I. This is ok.
        \begin{enumerate}
              \item I expect this to be "1", but it is "a)"
        \end{enumerate}
\end{enumerate}

How can I make the inner item to be a number and not a letter?

Best Answer

\begin{enumerate}[I]
    \item numeral I. This is ok.
    \begin{enumerate}[1.]
        \item I expect this to be "1", but it is "a)"
    \end{enumerate}
\end{enumerate}