Mutations in keratin genes or the genes that regulate keratin expression can result in epithelial cells lacking sufficient structural integrity. The resulting disruption of connective tissue gives rise to inherited disorders such epidermolysis bullosa. It has been found that various cannabinoids (including mixtures of cannabidiols and cannabinol) upregulate expression of various keratins such that loss of function in other keratin genes may be compensated for. By way of this upregulation, these cannabinoids can be used to treat epidermolysis bullosa and other connective tissue disorders arising from intermediate filament dysfunction.