Rubber composition based on at least: - a diene elastomer, - a reinforcing filler, - a crosslinking system, - from 1 to 30 parts by weight, per hundred parts by weight of elastomer, phr, of an epoxy resin, - between 1 and 15 phr of an amine hardener comprising at least two primary amine functions, located on at least one six-membered aromatic ring, said at least one six-membered aromatic ring comprising: • at least one primary amine function, and • at least two Ri radicals, which are identical or different, selected from the group consisting of linear or branched C1-C6 alkyl radicals, halogens, ethers, tertiary amines, thioethers, ketones, esters and amides, substituted by linear or branched C1-C6 alkyl radicals, so that the at least one six-membered aromatic ring does not comprise a hydrogen atom located in the ortho position with respect to the primary amine functions, - an imidazole of general formula in which, • R a represents a hydrogen atom or a hydrocarbon group, optionally interrupted by one or more heteroatoms and/or substituted, • R b represents a hydrocarbon group, • R c and R d represent, independently of one another, a hydrogen atom or a hydrocarbon group, optionally interrupted by one or more heteroatoms and/or substituted, • or else R c and R d form, together with the carbon atoms of the imidazole ring to which they are attached, a ring optionally interrupted by one or more heteroatoms and/or substituted. - a diene elastomer, - a reinforcing filler, - a crosslinking system, - from 1 to 30 parts by weight, per hundred parts by weight of elastomer, phr, of an epoxy resin, - between 1 and 15 phr of an amine hardener comprising at least two primary amine functions, located on at least one six-membered aromatic ring, said at least one six-membered aromatic ring comprising: • at least one primary amine function, and • at least two Ri radicals, which are identical or different, selected from the group consisting of linear or branched C1-C6 alkyl radicals, halogens, ethers, tertiary amines, thioethers, ketones, esters and amides, substituted by linear or branched C1-C6 alkyl radicals, so that the at least one six-membered aromatic ring does not comprise a hydrogen atom located in the ortho position with respect to the primary amine functions, • at least one primary amine function, and • at least two Ri radicals, which are identical or different, selected from the group consisting of linear or branched C1-C6 alkyl radicals, halogens, ethers, tertiary amines, thioethers, ketones, esters and amides, substituted by linear or branched C1-C6 alkyl radicals, - an imidazole of general formula in which, • R a represents a hydrogen atom or a hydrocarbon group, optionally interrupted by one or more heteroatoms and/or substituted, • R b represents a hydrocarbon group, • R c and R d represent, independently of one another, a hydrogen atom or a hydrocarbon group, optionally interrupted by one or more heteroatoms and/or substituted, • or else R c and R d form, together with the carbon atoms of the imidazole ring to which they are attached, a ring optionally interrupted by one or more heteroatoms and/or substituted. • R a represents a hydrogen atom or a hydrocarbon group, optionally interrupted by one or more heteroatoms and/or substituted, • R b represents a hydrocarbon group, • R c and R d represent, independently of one another, a hydrogen atom or a hydrocarbon group, optionally interrupted by one or more heteroatoms and/or substituted, • or else R c and R d form, together with the carbon atoms of the imidazole ring to which they are attached, a ring optionally interrupted by one or more heteroatoms and/or substituted.