How to update kernel in Ubuntu 16.04?

I have just downloaded 3 files to update my kernel. The files are as follows:

linux-image-4.9.22-040922-generic_4.9.22-040922.201704120731_i386.deb  
linux-headers-4.9.22-040922-generic_4.9.22-040922.201704120731_i386.deb  
linux-headers-4.9.22-040922_4.9.22-040922.201704120731_all.deb  

And I installed them using Ubuntu store but my kernel version is the same what should I do to update it ?
For what is it worth my kernel version is 4.4.0-72-generic (at least that what shows when I type uname -r in the terminal)

Read here how to upgrade kernel in Ubuntu 16.04. That way you will get security updates. Currently the kernel is 4.8.0-46-generic.