diff --git a/docs/docs/developers/versions-updating.md b/docs/docs/developers/versions-updating.md
index 6e391779633..6b570b12beb 100644
--- a/docs/docs/developers/versions-updating.md
+++ b/docs/docs/developers/versions-updating.md
@@ -130,3 +130,9 @@ If the dependencies fail to resolve ensure that the tag matches a tag in the [az
 ```bash
 aztec-up
 ```
+
+If exceptionally needing to test different versions, a `VERSION` tag can be specified. Eg to use `master`:
+
+```bash
+VERSION=master aztec-up
+```