diff --git a/scripts/upgrade.d/upgrade.generic.sh b/scripts/upgrade.d/upgrade.generic.sh
index 4765259..c68b8ca 100755
--- a/scripts/upgrade.d/upgrade.generic.sh
+++ b/scripts/upgrade.d/upgrade.generic.sh
@@ -17,7 +17,9 @@ COMMON_UPGRADE () {
 
 	# Retrieve new Nextcloud sources in a temporary directory
 	TMPDIR=$(mktemp -d)
-	extract_nextcloud "$TMPDIR"	# Télécharge nextcloud, vérifie sa somme de contrôle et le décompresse.
+	# Set temp folder ownership
+	sudo chown -R $app: "$TMPDIR"
+	extract_nextcloud "$TMPDIR"	"$app" # Télécharge nextcloud, vérifie sa somme de contrôle et le décompresse.
 
 	# Copy Nextcloud configuration file
 	sed -i "s@#DOMAIN#@${domain}@g" ../conf/config.json