The invention relates to a pharmaceutical composition comprising factor VII encapsulated in micelles formed from block copolymer molecules containing (i) a hydrophilic polymer segment consisting of a polyalkylene glycol and (ii) a hydrophobic polymer segment consisting of a polyamino acid, with said polyamino acid comprising exclusively amino acid residues selected from the group consisting of histidine, lysine, aspartic acid and glutamic acid residues, wherein a part of said amino acid residues is substituted with a hydrophobic group.
