diff --git a/paperseek_core/client/models.py b/paperseek_core/client/models.py
index fea871d..bd142c1 100644
--- a/paperseek_core/client/models.py
+++ b/paperseek_core/client/models.py
@@ -29,8 +29,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self:
@@ -95,8 +94,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self:
@@ -164,8 +162,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self:
@@ -232,8 +229,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self:
@@ -298,8 +294,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self:
@@ -376,8 +371,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self:
@@ -545,8 +539,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self:
@@ -619,8 +612,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self:
@@ -695,8 +687,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self:
@@ -761,8 +752,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self:
@@ -844,8 +834,7 @@ def to_str(self) -> str:
 
     def to_json(self) -> str:
         """Returns the JSON representation of the model using alias"""
-        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
-        return json.dumps(self.to_dict())
+        return self.model_dump_json(by_alias=True, exclude_unset=True)
 
     @classmethod
     def from_json(cls, json_str: str) -> Self: