diff --git a/yolort/models/darknetv5.py b/yolort/models/darknetv5.py
index 8701253f..47e60784 100644
--- a/yolort/models/darknetv5.py
+++ b/yolort/models/darknetv5.py
@@ -5,7 +5,7 @@
 from torch import nn, Tensor
 from torch.hub import load_state_dict_from_url
 
-from yolort.v5 import Conv, Focus, BottleneckCSP, C3, SPP
+from yolort.v5 import Conv, Focus, BottleneckCSP, C3, SPPF
 from ._utils import _make_divisible
 
 
@@ -88,7 +88,7 @@ def __init__(
         # building last CSP blocks
         last_channel = _make_divisible(last_channel * width_multiple, round_nearest)
         layers.append(Conv(input_channel, last_channel, k=3, s=2, version=version))
-        layers.append(SPP(last_channel, last_channel, k=(5, 9, 13), version=version))
+        layers.append(SPPF(last_channel, last_channel, k=5, version=version))
 
         self.features = nn.Sequential(*layers)
         self.avgpool = nn.AdaptiveAvgPool2d(1)