diff --git a/integrations/weave/src/haystack_integrations/components/connectors/weave/weave_connector.py b/integrations/weave/src/haystack_integrations/components/connectors/weave/weave_connector.py
index d3bddb5c53..f5565b2b5e 100644
--- a/integrations/weave/src/haystack_integrations/components/connectors/weave/weave_connector.py
+++ b/integrations/weave/src/haystack_integrations/components/connectors/weave/weave_connector.py
@@ -2,9 +2,11 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
+from dataclasses import asdict, is_dataclass
 from typing import Any
 
 from haystack import component, default_from_dict, default_to_dict, logging, tracing
+from pydantic import BaseModel
 
 from haystack_integrations.tracing.weave import WeaveTracer
 from weave.trace.settings import UserSettings
@@ -110,7 +112,10 @@ def to_dict(self) -> dict[str, Any]:
         weave_init_kwargs = self.weave_init_kwargs.copy()
         settings = weave_init_kwargs.get("settings", None)
         if isinstance(settings, UserSettings):
-            weave_init_kwargs["settings"] = settings.model_dump(mode="json", exclude_defaults=True)
+            if isinstance(settings, BaseModel):
+                weave_init_kwargs["settings"] = settings.model_dump(mode="json", exclude_defaults=True)
+            elif is_dataclass(settings):
+                weave_init_kwargs["settings"] = asdict(settings)
 
         return default_to_dict(self, pipeline_name=self.pipeline_name, weave_init_kwargs=weave_init_kwargs)
 
diff --git a/integrations/weave/tests/test_weave_connector.py b/integrations/weave/tests/test_weave_connector.py
index 016e917f07..9cc81b47e5 100644
--- a/integrations/weave/tests/test_weave_connector.py
+++ b/integrations/weave/tests/test_weave_connector.py
@@ -97,9 +97,7 @@ def test_serialization_of_weave_init_kwargs_with_user_settings(self) -> None:
         serialized: dict[str, Any] = connector.to_dict()
 
         assert serialized["init_parameters"]["pipeline_name"] == "test_pipeline"
-        assert serialized["init_parameters"]["weave_init_kwargs"] == {
-            "settings": {"implicitly_patch_integrations": False}
-        }
+        assert serialized["init_parameters"]["weave_init_kwargs"]["settings"]["implicitly_patch_integrations"] is False
         assert "type" in serialized
         assert serialized["type"] == "haystack_integrations.components.connectors.weave.weave_connector.WeaveConnector"
 
@@ -108,7 +106,7 @@ def test_serialization_of_weave_init_kwargs_with_user_settings(self) -> None:
         assert isinstance(deserialized, WeaveConnector)
         assert deserialized.pipeline_name == "test_pipeline"
         assert deserialized.tracer is None  # tracer is only initialized with warm_up
-        assert deserialized.weave_init_kwargs == {"settings": {"implicitly_patch_integrations": False}}
+        assert deserialized.weave_init_kwargs["settings"]["implicitly_patch_integrations"] is False
 
     def test_pipeline_tracing(self, mock_weave_client: Mock, sample_pipeline: Pipeline) -> None:
         """Test that pipeline operations are correctly traced"""