diff --git a/ultralytics/models/yolo/detect/train.py b/ultralytics/models/yolo/detect/train.py
index 65b7efff2..27d172b2e 100644
--- a/ultralytics/models/yolo/detect/train.py
+++ b/ultralytics/models/yolo/detect/train.py
@@ -60,7 +60,7 @@ class DetectionTrainer(BaseTrainer):
         if self.args.multi_scale:
             imgs = batch["img"]
             sz = (
-                random.randrange(self.args.imgsz * 0.5, self.args.imgsz * 1.5 + self.stride)
+                random.randrange(int(self.args.imgsz * 0.5), int(self.args.imgsz * 1.5 + self.stride))
                 // self.stride
                 * self.stride
             )  # size