diff --git a/scripts/backup b/scripts/backup
index d678ee2..af8ccd9 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -7,7 +7,7 @@ set -eu
 app=$YNH_APP_INSTANCE_NAME
 
 # Source YunoHost helpers
-. /usr/share/yunohost/helpers
+source /usr/share/yunohost/helpers
 
 # Backup sources & data
 # Note: the last argument is where to save this path, see the restore script.
diff --git a/scripts/install b/scripts/install
index d4f9039..f1b2bf4 100755
--- a/scripts/install
+++ b/scripts/install
@@ -23,7 +23,7 @@ is_public=$YNH_APP_ARG_IS_PUBLIC
 language=$YNH_APP_ARG_LANGUAGE
 
 # Source YunoHost helpers
-. /usr/share/yunohost/helpers
+source /usr/share/yunohost/helpers
 
 # Save app settings
 ynh_app_setting_set "$app" admin "$admin"
diff --git a/scripts/remove b/scripts/remove
index fdbcc3f..59ef331 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -4,7 +4,7 @@
 app=$YNH_APP_INSTANCE_NAME
 
 # Source YunoHost helpers
-. /usr/share/yunohost/helpers
+source /usr/share/yunohost/helpers
 
 # Retrieve app settings
 domain=$(ynh_app_setting_get "$app" domain)
diff --git a/scripts/restore b/scripts/restore
index 9acd9e6..a83fa6d 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -10,7 +10,7 @@ set -eu
 app=$YNH_APP_INSTANCE_NAME
 
 # Source YunoHost helpers
-. /usr/share/yunohost/helpers
+source /usr/share/yunohost/helpers
 
 # Retrieve old app settings
 domain=$(ynh_app_setting_get "$app" domain)
diff --git a/scripts/upgrade b/scripts/upgrade
index 27742a9..1decc77 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -7,7 +7,7 @@ set -eu
 app=$YNH_APP_INSTANCE_NAME
 
 # Source YunoHost helpers
-. /usr/share/yunohost/helpers
+source /usr/share/yunohost/helpers
 
 # Retrieve app settings
 domain=$(ynh_app_setting_get "$app" domain)