The aim of the paper is to improve the original Sturm bound. First, we recall the statement and proof of the dimension formulas for Mk(Γ) and Sk(Γ) which shows that Mk(Γ) and Sk(Γ) are finite dimensional vector spaces over C. Then, we define the "true bounds" of Mk(Γ) and Sk(Γ), and compare them with the Sturm bound. Finally, according to our computation of their differences on sage, we find a way to improve the Sturm bound.