Redmine

I'm very new to Redmine and I'm wondering how you others handle documents such as tech. specs, requirements, etc. The point is that these documents (Word, Excel...:( ) change over time.

One solution that occurred to me would be to keep the revisions in a repository and then manually update the files in "Documents" when a new official revision appears. This process seems a bit cumbersome to me; eg when manual updates are required it is easy to forget them.

So does anybody store important documents in the "Documents" section? If so how do you manage the different revisions?