diff --git a/README.md b/README.md
index d81ffb7..016e667 100644
--- a/README.md
+++ b/README.md
@@ -207,7 +207,7 @@ the cluster.
 
 3. Prepare the leader node
 
-    juju upgrade-series prepare $MACHINE_NUMBER $SERIES
+    juju upgrade-series $MACHINE_NUMBER prepare $SERIES
 
 4. Administratively perform the upgrade.
 * do-release-upgrade plus any further steps administratively required steps for an upgrade.
@@ -216,7 +216,7 @@ the cluster.
 
 6. Complete the series upgrade on the leader:
 
-    juju upgrade-series complete $MACHINE_NUMBER
+    juju upgrade-series $MACHINE_NUMBER complete
 
 7. Administratively validate the leader node database is up and running
 * Connect to the database and check for expected data
@@ -224,10 +224,10 @@ the cluster.
 
 8. Upgrade the non-leader nodes one at a time following the same pattern summarized bellow:
 
-* juju upgrade-series prepare $MACHINE_NUMBER $SERIES
+* juju upgrade-series $MACHINE_NUMBER prepare $SERIES
 * Administratively Upgrade
 * Reboot
-* juju upgrade-series complete $MACHINE_NUMBER
+* juju upgrade-series $MACHINE_NUMBER complete
 * Validate
 
 9. Finalize the upgrade
diff --git a/hooks/percona_hooks.py b/hooks/percona_hooks.py
index 989e262..49ea11a 100755
--- a/hooks/percona_hooks.py
+++ b/hooks/percona_hooks.py
@@ -461,6 +461,12 @@ def series_upgrade():
 
     resume_unit_helper(register_configs())
 
+    # finally update the sstuser if needed.
+    # BUG: #1838044
+    _sst_password = sst_password()
+    if _sst_password:
+        configure_sstuser(_sst_password)
+
 
 @hooks.hook('upgrade-charm')
 @harden()