  We study SU(2) gauge theory with two Dirac fermions in the adjoint
representation of the gauge group on the lattice. Using clover improved Wilson
fermion action with hypercubic truncated stout smearing we perform simulations
at larger coupling than earlier. We measure the evolution of the coupling
constant using the step scaling method with Schr\"odinger functional and study
the remaining discretization effects. At weak coupling we observe significant
discretization effects, which make it difficult to obtain a fully controlled
continuum limit. Nevertheless, the data remains consistent with the existence
of a fixed point in the interval $2.2\lesssim g^{\ast 2}\lesssim 3$. We also
measure the anomalous dimension and find its value at the fixed point is
$\gamma^\ast\simeq 0.2\pm 0.03$.
