diff --git a/docs/deploy-viya.md b/docs/deploy-viya.md
index 28d27ae..7d205f9 100644
--- a/docs/deploy-viya.md
+++ b/docs/deploy-viya.md
@@ -152,6 +152,16 @@ To explain each of these lines:
 
 If you have additional libraries that you would like to use in Data Controller, they should also be defined here.
 
+## Redeployment / Upgrade / Migration
+
+To update DC, just deploy it as a fresh instance, then move the new config across, as follows:
+
+1.  Do a full deploy to a new location
+2.  Copy the contents of the old `$(appLoc)/services/settings.sas` file to the new SAS Folder location
+3.  Delete the new physical directory (just created) as it is now replaced with the old one (per step 2)
+4.  Either delete or rename the old SAS Folder location (appLoc), and rename the new SAS Folder location to equal the old one
+5.  If using a dedicated web frontend, backup/rename so that the new web server location matches the old one
+6.  Run any migrations relevant to the release, as defined [here](https://git.datacontroller.io/dc/dc/src/branch/main/sas/sasjs/db/migrations)
 
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