diff --git a/src/Laragenie.php b/src/Laragenie.php
index b64a50d..2196e0b 100755
--- a/src/Laragenie.php
+++ b/src/Laragenie.php
@@ -4,4 +4,11 @@
 
 class Laragenie
 {
+    protected $fillable = [
+        'question', 'answer', 'cost', 'question_embedding',
+    ];
+
+    protected $casts = [
+        'cost' => 'double',
+    ];
 }