GitLab API: Update group: Method Not Allowed

I am using GitLab Community Edition 8.4.4

I tried to change name of Group:
curl --request PUT --header "PRIVATE-TOKEN: __ " “https://gitlab. __ com/api/v3/groups/5?name=gitlabgroup136&path=gitlabgroup136”

But result is:
405 Method Not Allowed

I am sure that Group Id is correct.
And I am sure that I have permission to change this Group (I am owner of Group and I am administrator).
I can change name of Projects and Users by similar way. So I almost sure that syntax is correct.

But why its not working?