Hello Andrei,
According to the National Sleep Foundation:
"As we get older, our bodies produce less of an anti-diuretic hormone that enables us to retain fluid. With decreased concentrations of this hormone, we produce more urine at night. The bladder [also] tends to lose holding capacity as we age. Finally, older people are more likely to suffer from medical problems that may have an effect on the bladder."
Also keep in mind that drinking diuretics, such as alcohol and coffee, cause the body to produce more urine.
Hope this info is helpful.
Best to you,
Maria