16.04 - Upgrade docker-compose permission denied

I am trying to upgrade docker-compose since with the current version I get some error when running a .yml file. Here my current situation:

$ which docker
/usr/bin/docker
$ which docker compose

/usr/bin/docker-compose

$ ls -al | grep docker
-rwxr-xr-x  1 root   root    13511128 Feb 28 09:02 docker
-rwxr-xr-x  1 root   root         336 Dez 11  2015 docker-compose
-rwxr-xr-x  1 root   root    11314960 Feb 28 09:01 docker-containerd
-rwxr-xr-x  1 root   root    10464424 Feb 28 09:01 docker-containerd-ctr
-rwxr-xr-x  1 root   root     1976648 Feb 28 09:01 docker-containerd-shim
-rwxr-xr-x  1 root   root    39473368 Feb 28 09:03 dockerd
-rwxr-xr-x  1 root   root      862296 Feb 28 09:01 docker-init

-rwxr-xr-x  1 root   root     2573840 Feb 28 09:01 docker-proxy
-rwxr-xr-x  1 root   root     8195464 Feb 28 09:01 docker-runc

When tryint to update docker-compose from https://github.com/docker/compose/releases. The output of the command:

sudo curl -L https://github.com/docker/compose/releases/download/1.11.2/docker-compose-`uname -s`-`uname -m` > /usr/bin/docker-compose

gives me:

bash: /usr/bin/docker-compose: Permission denied

I am also sudoing the command. Why is that? thanks