Yes, as the Office of the President is largely ceremonial now. In this referendum, there are a few notable changes to the constitution that will give the President more official powers as seen below.
##1.
The existing parliamentary system of government will be replaced with an executive presidency and a presidential system. This means that the office of the Prime Minister will be abolished, thus giving more authority to the President in deciding the policies of the country.
##2.
The President will be given more authority over Supreme Board of Judges and Prosecutors appointments.
##3.
Also, the incumbent President can now hold the office until 2029, with 1 more 5-year term compared to currently.
This graphic published in CNN summarised everything that's changed:
