diff --git a/scripts/backup b/scripts/backup
index f6484b1..5ddf19d 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -eu
 
 # Source app helpers
 source /usr/share/yunohost/helpers
diff --git a/scripts/restore b/scripts/restore
index e81e2fe..6e2db97 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -eu
 
 # Source app helpers
 source /usr/share/yunohost/helpers
@@ -14,14 +15,14 @@ db_pass=$(ynh_app_setting_get $app db_pass)
 
 if [ -d $final_path ]; then
     echo "There is already a directory: $final_path " >&2
-    exit 1
+    ynh_die
 fi
 
 # Restore Nginx
 conf=/etc/nginx/conf.d/$domain.d/$app.conf
 if [ -f $conf ]; then
     echo "There is already a nginx conf file at this path: $conf " >&2
-    exit 1
+    ynh_die
 fi
 sudo cp -a ./nginx.conf $conf
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 54fe0f8..3d6fdd8 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -eu
 
 source .fonctions       # Charge les fonctions génériques habituellement utilisées dans le script