The present invention provides an adjuvanting material, the adjuvanting material comprising a lipid dendritic cell targeting moiety to which is covalently linked a metal chelating group. Further, the present invention provides an immunogenic composition comprising (a) a lipid dendritic cell targeting moiety to which is covalently linked a metal chelating group (b) an antigen comprising a metal affinity tag and optionally (c) metal ions, whereby the antigen is linked to the lipid dendritic cell targeting moiety via the interaction between the metal affinity tag and the metal chelating group.
