diff --git a/scripts/backup b/scripts/backup
index 1cb10c7..0a984d6 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -7,6 +7,9 @@ app=pluxml
 app_path=/var/www/$app
 save_path=$1
 
+# Source YunoHost helpers
+source /usr/share/yunohost/helpers
+
 sudo mkdir -p $save_path
 sudo cp -R $app_path/data $save_path/
 sudo cp $app_path/config.php $save_path/
diff --git a/scripts/install b/scripts/install
index cc5e0ec..d7c1a50 100644
--- a/scripts/install
+++ b/scripts/install
@@ -13,6 +13,9 @@ password=$4
 is_public=$5
 default_lang=$6
 
+# Source YunoHost helpers
+source /usr/share/yunohost/helpers
+
 # Remove trailing slash
 [ "$path" != "/" ] && path=${path%/}
 
diff --git a/scripts/remove b/scripts/remove
index f612c80..fd7318f 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -3,6 +3,9 @@
 app=pluxml
 domain=$(sudo yunohost app setting $app domain)
 
+# Source YunoHost helpers
+source /usr/share/yunohost/helpers
+
 # Remove sources
 sudo rm -rf /var/www/$app
 
diff --git a/scripts/restore b/scripts/restore
index 23d9a2a..eb50a1f 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -7,6 +7,9 @@ app=pluxml
 app_path=/var/www/$app
 save_path=$1
 
+# Source YunoHost helpers
+source /usr/share/yunohost/helpers
+
 sudo cp $save_path/config.php $app_path/
 sudo rm -rf $app_path/data
 sudo cp -R $save_path/data $app_path/
diff --git a/scripts/upgrade b/scripts/upgrade
index b52f231..6ff4765 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -11,6 +11,9 @@ path=$(sudo yunohost app setting $app path)
 admin=$(sudo yunohost app setting $app admin)
 is_public=$(sudo yunohost app setting $app is_public)
 
+# Source YunoHost helpers
+source /usr/share/yunohost/helpers
+
 # Remove trailing "/" for next commands
 path=${path%/}