diff --git a/ptx2-3-vers-4.sh b/ptx2-3-vers-4.sh
index f54facbc77626d0de9ef0affca8b8a7f1facd5b5..4c55479a6301f2669cc76c7555cadb4299613093 100755
--- a/ptx2-3-vers-4.sh
+++ b/ptx2-3-vers-4.sh
@@ -31,7 +31,8 @@ exec 2>>"$fichierlog"
 # Suppression de la référence au dépôt Primtux2-Lubuntu
 sed -i '/PrimTux-Lubuntu/d' /etc/apt/sources.list.d/primtux.list
 
-apt-get update && apt-get dist-upgrade
+apt-get update
+DEBIAN_FRONTEND='noninteractive' apt-get -y dist-upgrade
 
 # Vérifie l'OS
 archi=$(uname -m)