diff --git a/advanced/databases/livedet_iris_2020/1.py b/advanced/databases/livedet_iris_2020/1.py
index 43ef6307392ccca62b089b6fa268eb0dd114a600..f8460135a13ed794bdfcbd6f1fb9685b75395424 100644
--- a/advanced/databases/livedet_iris_2020/1.py
+++ b/advanced/databases/livedet_iris_2020/1.py
@@ -37,4 +37,4 @@ class Test(View):
         elif output == "label":
             return {"value": bool(obj.label)}
         elif output == "category":
-            return {"value": int(obj.category)}
+            return {"value": np.cast["int32"](obj.category)}