diff --git a/tools/debian/control b/tools/debian/control
index fec60a152..fe734c063 100644
--- a/tools/debian/control
+++ b/tools/debian/control
@@ -4,4 +4,4 @@ Architecture: amd64
 Maintainer: Emmanuel Viennet <emmanuel@viennet.net>
 Description: ScoDoc 9
  Un logiciel pour le suivi de la scolarité universitaire.
-Depends: adduser, curl, gcc, graphviz, libpq-dev, postfix|exim4, cracklib-runtime, libcrack2-dev, python3-dev, python3-venv, python3-pip, python3-wheel, nginx, postgresql, redis, ufw, systemctl
+Depends: adduser, curl, gcc, graphviz, libpq-dev, postfix|exim4, cracklib-runtime, libcrack2-dev, python3-dev, python3-venv, python3-pip, python3-wheel, nginx, postgresql, redis, ufw
diff --git a/tools/upgrade.sh b/tools/upgrade.sh
index 02db2b127..7a7d9b462 100755
--- a/tools/upgrade.sh
+++ b/tools/upgrade.sh
@@ -25,6 +25,10 @@ check_uid_root "$0"
 if [ -z "$SCODOC_UPGRADE_RUNNING" ]
    then
        apt-get update && apt-get -y dist-upgrade
+       # install spécifiquement scodoc9, utile si les dépendances Debian de scodoc9
+       # ont été changées, ce qui peut provoquer un
+       # "packages have been kept back"
+       apt install scodoc9
 fi
 systemctl restart redis
 systemctl restart nginx