diff --git a/manifest.toml b/manifest.toml
index bf114e5..cbd1b01 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -78,6 +78,14 @@ ram.runtime = "50M"
 
     autoupdate.strategy = "latest_gitlab_release"
 
+    [resources.sources.migration_script]
+    url = "https://framagit.org/yakforms/yakforms/-/raw/v1.1/framaforms2yakforms.php"
+    sha256 = "58a2e7378461dc5db70f59d69d37c0d6bd34eed224872151db5a794fdf33d07a"
+    format = "whatever"
+    extract = false
+    rename = "framaforms2yakforms.php"
+    prefetch = false
+
     [resources.system_user]
 
     [resources.install_dir]
diff --git a/scripts/upgrade b/scripts/upgrade
index b906109..11cab9f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -22,8 +22,9 @@ else
     upgrade_to_yakforms=false
 fi
 
-if [ "$upgrade_to_yakforms" = false ]; then
+if [ "$upgrade_to_yakforms" = true ]; then
     pushd "$install_dir"
+        ynh_setup_source --source_id="migration_script" --dest_dir="$install_dir/app"
         ynh_exec_as "$app" env "PATH=$PATH" "php$phpversion" framaforms2yakforms.php backup
         _ynh_exec_with_drush_php drush "@$app" dis framaforms
         _ynh_exec_with_drush_php drush "@$app" pm-uninstall framaforms