diff --git a/bin/post_sfos-upgrade b/bin/post_sfos-upgrade
index aa09682..3be58a1 100644
--- a/bin/post_sfos-upgrade
+++ b/bin/post_sfos-upgrade
@@ -54,17 +54,27 @@ primuser="$(loginctl list-sessions | fgrep seat0 | tr -s ' ' | cut -d ' ' -f 4)"
 # Paths for SailfishOS ≥ 2.2.1 rsp. SailfishOS < 2.2.1, see chapter "Final clean up" at https://docs.sailfishos.org/Support/Help_Articles/Updating_Sailfish_OS/#final-clean-up
 rm -f "/home/${primuser}/.cache/sailfish-osupdateservice/os-info" "/home/${primuser}/.cache/store-client/os-info"
 
+printf '%s\n' "- Cleansing ssu(d)\'s caches and restarting it."
+for i in -TERM -INT -TERM -HUP -KILL -Failed_to_kill_ssud
+do
+  if pgrep -x ssud > /dev/null
+  then eval pkill $i -x ssud
+  else break
+  fi
+  sleep 1
+done
+printf '\n'
+rm -rf /var/cache/ssu/*
+ssu ur
+
 if command -v zypper > /dev/null 2>&1
 then
 #  No need to be "brutal":
-#  printf '%s\n' "- Cleaning zypper's caches:"
+#  printf '%s\n' "- Cleansing zypper's caches:"
 #  zypper clean -m || exit $?
   printf '%s\n' "- Refreshing zypper's caches:"
   zypper refresh || exit $?
-  printf '\n'
-  # Syncing, as I could not determine if zypper already does that:
-  sync
-  printf '%s\n' "- Checking for updates by zypper:"
+  printf '\n%s\n' "- Checking for updates by zypper:"
   # As of SailfishOS 4.1.0, `version --dup` does not seem to always update all packages, any more:
   zypper update -y -l
   printf '\n'
@@ -75,8 +85,6 @@ fi
 # Would need to investigate, but refreshing twice will do no harm, anyway.
 printf '%s\n' "- Refreshing pkcon's caches:"
 pkcon refresh || exit $?
-# Syncing, as I could not determine if pkcon already does that:
-sync
 printf '%s\n' "- Checking for updates by pkcon:"
 # As of SailfishOS 4.1.0, `version --dup` does not seem to always update all packages, any more:
 pkcon -y update