diff --git a/damo/base_models/backbones/tinynas_csp.py b/damo/base_models/backbones/tinynas_csp.py
index 618b93b..560a21e 100644
--- a/damo/base_models/backbones/tinynas_csp.py
+++ b/damo/base_models/backbones/tinynas_csp.py
@@ -243,7 +243,7 @@ def __init__(self, convstem, act='relu', reparam=False, with_spp=False):
                                         2,
                                         act=self.act)
         if self.with_spp:
-            self.spp = SPPBottleneck(hidden_dim * 2, hidden_dim * 2)
+            self.spp = SPPBottleneck(hidden_dim * 2, hidden_dim * 2, activation=self.act)
         if len(self.convstem) > 0:
             self.conv_start = ConvKXBNRELU(hidden_dim * 2,
                                            hidden_dim,
diff --git a/damo/base_models/backbones/tinynas_mob.py b/damo/base_models/backbones/tinynas_mob.py
index 286a502..3be5494 100644
--- a/damo/base_models/backbones/tinynas_mob.py
+++ b/damo/base_models/backbones/tinynas_mob.py
@@ -205,7 +205,7 @@ def __init__(self,
             self.block_list.append(the_block)
             if block_id == 0 and with_spp:
                 self.block_list.append(
-                    SPPBottleneck(out_channels, out_channels))
+                    SPPBottleneck(out_channels, out_channels, activation=act))
 
     def forward(self, x):
         output = x
diff --git a/damo/base_models/backbones/tinynas_res.py b/damo/base_models/backbones/tinynas_res.py
index 73cf5a0..e39487f 100644
--- a/damo/base_models/backbones/tinynas_res.py
+++ b/damo/base_models/backbones/tinynas_res.py
@@ -128,7 +128,7 @@ def __init__(self,
             self.block_list.append(the_block)
             if block_id == 0 and with_spp:
                 self.block_list.append(
-                    SPPBottleneck(out_channels, out_channels))
+                    SPPBottleneck(out_channels, out_channels, activation=act))
 
     def forward(self, x):
         output = x
diff --git a/damo/base_models/core/ops.py b/damo/base_models/core/ops.py
index 3bf3747..02ec062 100644
--- a/damo/base_models/core/ops.py
+++ b/damo/base_models/core/ops.py
@@ -39,6 +39,8 @@ def get_activation(name='silu', inplace=True):
             module = nn.SiLU(inplace=inplace)
         elif name == 'relu':
             module = nn.ReLU(inplace=inplace)
+        elif name == 'relu6':
+            module = nn.ReLU6(inplace=inplace)
         elif name == 'lrelu':
             module = nn.LeakyReLU(0.1, inplace=inplace)
         elif name == 'swish':
diff --git a/damo/utils/visualize.py b/damo/utils/visualize.py
index cfba883..7c2f78c 100644
--- a/damo/utils/visualize.py
+++ b/damo/utils/visualize.py
@@ -8,7 +8,7 @@
 
 
 def vis(img, boxes, scores, cls_ids, conf=0.5, class_names=None):
-
+    img = np.copy(img) # https://github.com/opencv/opencv/issues/24522
     for i in range(len(boxes)):
         box = boxes[i]
         cls_id = int(cls_ids[i])