My Moz domain authority fell last week but so did all 3 of my competitors. What could cause that?

[SteveBrumpton]

As a loyal Moz Pro subscriber I track my site's authority, trust and links against 3 similar competitors.  Last week my authority fell from 61 to 60 but all 3 competitors saw a drop in their authority that week too.  Was the Moz domain authority calculation changed?  Did anyone else see a drop or has something odd happened to just our market? Any ideas?

Not sure if this is something I should address or just shrug and ignore.

Cheers

[KeriMorgret]

We had an update to Mozscape last week, so everyone's numbers got updated. You'll see small changes like that when we update, it's nothing to worry about.