diff --git a/setup/updating.md b/setup/updating.md
index 1dae47a48..9ebe32948 100644
--- a/setup/updating.md
+++ b/setup/updating.md
@@ -100,7 +100,13 @@ If this happens, we recommend uninstalling and reinstalling:
 
    > Double-check your values file to ensure it only contains your changes.
 
-1. Run `helm uninstall`:
+1. Run `helm uninstall`. This will uninstall all Coder-related services on the
+   cluster (though it preserves the namespaces). It will not delete user
+   environments or their associated volumes.
+
+   > `helm uninstall` will delete the timescale instance internal to the
+   > cluster. If you're using an external PostgreSQL database, this will not be
+   > affected.
 
    ```console
    helm uninstall --namespace coder coder