student cdf and normal ppf precision

Is there a way to increase the precision for the scipy.stats functions norm.pdf and t.cdf? Because if I do this it works:

from scipy.stats import norm, t
norm.ppf(t.cdf(9, 140))

but if I do the following, I got "inf" for the pdf and "1.0" for the cdf:

norm.ppf(t.cdf(10, 140))

Thanks in advance