Compositions and methods for enhancing an immune response with an adjuvant composition comprising: an anti-dendritic cell (DC)-specific antibody or fragment thereof conjugated to at least a portion of a TLR agonist and a pharmaceutically acceptable carrier are disclosed herein. The conjugate and agonist are each comprised in an amount such that, in combination with the other, are effective to produce the immune response in a human or animal subject in need of immunostimulation.