  We propose an evolution equation for unintegrated gluon densities that is
valid for large values of the QCD coupling constant $\bar{\alpha} _s$. Our
approach is based on the linear resummation model introduced by Sta\'{s}to. We
generalize the model including a non-linear term in the diffusive regime. The
validity of the diffusive evolution at strong coupling is supported by the
AdS/CFT consideration, as well as perturbative arguments. We solve the
evolution equation numerically and extract the saturation scale, which we
compare with the weak coupling counterpart.
