Field-theoretic renormalization group is applied to the Kraichnan model of a passive scalar advected by the Gaussian velocity field with the covariance [formula presented] Inertial-range anomalous exponents, related to the scaling dimensions of tensor composite operators built of the scalar gradients, are calculated to the order [formula presented] of the [formula presented] expansion. The nature and the convergence of the [formula presented] expansion in the models of turbulence are briefly discussed.