diff --git a/PaddleCV/yolov3/eval.py b/PaddleCV/yolov3/eval.py
index 9a0ceae2fd1c0e3b10c3ebd88ce205abe2f2b157..0381ec44a1f319dec0c7ad4e8eac103e53dfb2cc 100644
--- a/PaddleCV/yolov3/eval.py
+++ b/PaddleCV/yolov3/eval.py
@@ -68,7 +68,7 @@ def eval():
             res = {
                     'image_id': im_id,
                     'category_id': label_ids[int(label)],
-                    'bbox': map(float, bbox),
+                    'bbox': list(map(float, bbox)),
                     'score': float(score)
             }
             result.append(res)