diff -r 706f10bcdc3c -r f5690d918358 server/src/app/Models/GeonamesHierarchy.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/server/src/app/Models/GeonamesHierarchy.php	Sun Oct 02 19:14:07 2016 +0200
@@ -0,0 +1,17 @@
+<?php
+
+namespace CorpusParole\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class GeonamesHierarchy extends Model
+{
+    /**
+     * The attributes that should be casted to native types.
+     *
+     * @var array
+     */
+    protected $casts = [
+        'hierarchy' => 'array',
+    ];
+}