diff --git a/diceplayer/config/dice_config.py b/diceplayer/config/dice_config.py
index 8730ed2..907d5bf 100644
--- a/diceplayer/config/dice_config.py
+++ b/diceplayer/config/dice_config.py
@@ -1,7 +1,7 @@
-from pydantic import BaseModel, Field
-
 from diceplayer.shared.utils.dataclass_protocol import Dataclass
 
+from pydantic import BaseModel, Field
+
 from dataclasses import dataclass, fields
 from typing import List, Literal
 
@@ -12,16 +12,33 @@ class DiceConfig(BaseModel):
     """
 
     ljname: str = Field(..., description="Name of the Lennard-Jones potential file")
-    outname: str = Field(..., description="Name of the output file for the simulation results")
+    outname: str = Field(
+        ..., description="Name of the output file for the simulation results"
+    )
     dens: float = Field(..., description="Density of the system")
-    nmol: List[int] = Field(..., description="List of the number of molecules for each component")
-    nstep: List[int] = Field(..., description="List of the number of steps for each component", min_length=2, max_length=3)
+    nmol: List[int] = Field(
+        ..., description="List of the number of molecules for each component"
+    )
+    nstep: List[int] = Field(
+        ...,
+        description="List of the number of steps for each component",
+        min_length=2,
+        max_length=3,
+    )
 
-    upbuf: int = Field(360, description="Buffer size for the potential energy calculations")
-    combrule: Literal["+", "*"] = Field("*", description="Combination rule for the Lennard-Jones potential")
+    upbuf: int = Field(
+        360, description="Buffer size for the potential energy calculations"
+    )
+    combrule: Literal["+", "*"] = Field(
+        "*", description="Combination rule for the Lennard-Jones potential"
+    )
     isave: int = Field(1000, description="Frequency of saving the simulation results")
     press: float = Field(1.0, description="Pressure of the system")
     temp: float = Field(300.0, description="Temperature of the system")
-    progname: str = Field("dice", description="Name of the program to run the simulation")
-    randominit: str = Field("first", description="Method for initializing the random number generator")
+    progname: str = Field(
+        "dice", description="Name of the program to run the simulation"
+    )
+    randominit: str = Field(
+        "first", description="Method for initializing the random number generator"
+    )
     seed: int | None = Field(None, description="Seed for the random number generator")
diff --git a/diceplayer/config/gaussian_config.py b/diceplayer/config/gaussian_config.py
index 2f9b4c5..bc741b2 100644
--- a/diceplayer/config/gaussian_config.py
+++ b/diceplayer/config/gaussian_config.py
@@ -1,10 +1,9 @@
-from typing import Literal
+from diceplayer.shared.utils.dataclass_protocol import Dataclass
 
 from pydantic import BaseModel, Field
 
-from diceplayer.shared.utils.dataclass_protocol import Dataclass
-
 from dataclasses import dataclass, fields
+from typing import Literal
 
 
 class GaussianConfig(BaseModel):
@@ -13,9 +12,18 @@ class GaussianConfig(BaseModel):
     """
 
     level: str = Field(..., description="Level of theory for the QM calculations")
-    qmprog: Literal["g03", "g09", "g16"] = Field("g16", description="QM program to use for the calculations")
+    qmprog: Literal["g03", "g09", "g16"] = Field(
+        "g16", description="QM program to use for the calculations"
+    )
 
-    chgmult: list[int] = Field(default_factory=lambda: [0, 1], description="List of charge and multiplicity for the QM calculations")
-    pop: str = Field("chelpg", description="Population analysis method for the QM calculations")
+    chgmult: list[int] = Field(
+        default_factory=lambda: [0, 1],
+        description="List of charge and multiplicity for the QM calculations",
+    )
+    pop: str = Field(
+        "chelpg", description="Population analysis method for the QM calculations"
+    )
     chg_tol: float = Field(0.01, description="Charge tolerance for the QM calculations")
-    keywords: str = Field(None, description="Additional keywords for the QM calculations")
+    keywords: str = Field(
+        None, description="Additional keywords for the QM calculations"
+    )
diff --git a/diceplayer/config/player_config.py b/diceplayer/config/player_config.py
index 29d1e23..1ec4993 100644
--- a/diceplayer/config/player_config.py
+++ b/diceplayer/config/player_config.py
@@ -2,45 +2,48 @@ from diceplayer.config.dice_config import DiceConfig
 from diceplayer.config.gaussian_config import GaussianConfig
 from diceplayer.shared.utils.dataclass_protocol import Dataclass
 
+from pydantic import BaseModel, Field, field_validator, model_validator
+
 from dataclasses import dataclass, fields
+from pathlib import Path
+from typing import Self
+
+MIN_STEP = 20000
 
 
-@dataclass
-class PlayerConfig(Dataclass):
+class PlayerConfig(BaseModel):
     """
     Data Transfer Object for the player configuration.
     """
 
-    opt: bool
-    maxcyc: int
-    nprocs: int
-    ncores: int
+    opt: bool = Field(..., description="Whether to perform geometry optimization")
+    maxcyc: int = Field(
+        ..., description="Maximum number of cycles for the geometry optimization"
+    )
+    nprocs: int = Field(
+        ..., description="Number of processors to use for the QM calculations"
+    )
+    ncores: int = Field(
+        ..., description="Number of cores to use for the QM calculations"
+    )
 
-    dice: DiceConfig
-    gaussian: GaussianConfig
+    dice: DiceConfig = Field(..., description="Dice configuration")
+    gaussian: GaussianConfig = Field(..., description="Gaussian configuration")
 
-    mem: int = None
-    switchcyc: int = 3
-    qmprog: str = "g16"
-    altsteps: int = 20000
-    geoms_file = "geoms.xyz"
-    simulation_dir = "simfiles"
+    mem: int = Field(None, description="Memory configuration")
+    switchcyc: int = Field(3, description="Switch cycle configuration")
+    qmprog: str = Field("g16", description="QM program to use for the calculations")
+    altsteps: int = Field(
+        20000, description="Number of steps for the alternate simulation"
+    )
+    geoms_file: Path = Field(
+        "geoms.xyz", description="File name for the geometries output"
+    )
+    simulation_dir: Path = Field(
+        "simfiles", description="Directory name for the simulation files"
+    )
 
-    def __post_init__(self):
-        MIN_STEP = 20000
-        # altsteps value is always the nearest multiple of 1000
+    @model_validator(mode="after")
+    def validate_altsteps(self) -> Self:
         self.altsteps = round(max(MIN_STEP, self.altsteps) / 1000) * 1000
-
-    @classmethod
-    def from_dict(cls, params: dict):
-        if params["dice"] is None:
-            raise ValueError("Error: 'dice' keyword not specified in config file.")
-        params["dice"] = DiceConfig.model_validate(params["dice"])
-
-        if params["gaussian"] is None:
-            raise ValueError("Error: 'gaussian' keyword not specified in config file.")
-        params["gaussian"] = GaussianConfig.model_validate(params["gaussian"])
-
-        params = {f.name: params[f.name] for f in fields(cls) if f.name in params}
-
-        return cls(**params)
+        return self
diff --git a/diceplayer/player.py b/diceplayer/player.py
index 3e77848..5aa2f5b 100644
--- a/diceplayer/player.py
+++ b/diceplayer/player.py
@@ -1,5 +1,3 @@
-from pydantic import BaseModel
-
 from diceplayer import VERSION, logger
 from diceplayer.config.dice_config import DiceConfig
 from diceplayer.config.gaussian_config import GaussianConfig
@@ -14,6 +12,7 @@ from diceplayer.shared.utils.misc import weekday_date_time
 from diceplayer.shared.utils.ptable import atomsymb
 
 import yaml
+from pydantic import BaseModel
 
 import os
 import pickle
@@ -119,7 +118,6 @@ class Player:
                 else:
                     logger.info(f"{key} = {value}")
 
-
         logger.info(
             f"##########################################################################################\n"
             f"#############               Welcome to DICEPLAYER version {VERSION}                #############\n"
@@ -430,7 +428,7 @@ class Player:
 
     @staticmethod
     def set_config(data: dict) -> PlayerConfig:
-        return PlayerConfig.from_dict(data)
+        return PlayerConfig.model_validate(data)
 
     @staticmethod
     def read_keywords(infile) -> dict:
diff --git a/diceplayer/shared/interface/dice_interface.py b/diceplayer/shared/interface/dice_interface.py
index 848661c..c13ef63 100644
--- a/diceplayer/shared/interface/dice_interface.py
+++ b/diceplayer/shared/interface/dice_interface.py
@@ -356,9 +356,10 @@ class DiceInterface(Interface):
                     )
 
     def run_dice_file(self, cycle: int, proc: int, file_name: str):
-        with open(Path(file_name), "r") as infile, open(
-            Path(file_name + ".out"), "w"
-        ) as outfile:
+        with (
+            open(Path(file_name), "r") as infile,
+            open(Path(file_name + ".out"), "w") as outfile,
+        ):
             if shutil.which("bash") is not None:
                 exit_status = subprocess.call(
                     [
diff --git a/tests/shared/config/__init__.py b/tests/config/__init__.py
similarity index 100%
rename from tests/shared/config/__init__.py
rename to tests/config/__init__.py
diff --git a/tests/shared/config/test_dice_dto.py b/tests/config/test_dice_dto.py
similarity index 100%
rename from tests/shared/config/test_dice_dto.py
rename to tests/config/test_dice_dto.py
diff --git a/tests/shared/config/test_gaussian_dto.py b/tests/config/test_gaussian_dto.py
similarity index 100%
rename from tests/shared/config/test_gaussian_dto.py
rename to tests/config/test_gaussian_dto.py
diff --git a/tests/shared/config/test_player_dto.py b/tests/config/test_player_dto.py
similarity index 96%
rename from tests/shared/config/test_player_dto.py
rename to tests/config/test_player_dto.py
index 7a74a95..883fad0 100644
--- a/tests/shared/config/test_player_dto.py
+++ b/tests/config/test_player_dto.py
@@ -72,7 +72,7 @@ class TestPlayerDTO(unittest.TestCase):
         self.assertEqual(player_dto.altsteps, 20000)
 
     def test_from_dict(self):
-        player_dto = PlayerConfig.from_dict(get_config_dict())
+        player_dto = PlayerConfig.model_validate(get_config_dict())
 
         self.assertIsInstance(player_dto, PlayerConfig)
         self.assertIsInstance(player_dto.dice, DiceConfig)
diff --git a/tests/shared/interface/test_dice_interface.py b/tests/shared/interface/test_dice_interface.py
index 54ce426..b246f08 100644
--- a/tests/shared/interface/test_dice_interface.py
+++ b/tests/shared/interface/test_dice_interface.py
@@ -19,7 +19,7 @@ class TestDiceInterface(unittest.TestCase):
         logger.set_logger(stream=io.StringIO())
 
         config = yaml.load(get_config_example(), Loader=yaml.Loader)
-        self.config = PlayerConfig.from_dict(config["diceplayer"])
+        self.config = PlayerConfig.model_validate(config["diceplayer"])
 
     def test_class_instantiation(self):
         dice = DiceInterface()
diff --git a/tests/shared/interface/test_gaussian_interface.py b/tests/shared/interface/test_gaussian_interface.py
index 0a7f17f..723de74 100644
--- a/tests/shared/interface/test_gaussian_interface.py
+++ b/tests/shared/interface/test_gaussian_interface.py
@@ -16,7 +16,7 @@ class TestGaussianInterface(unittest.TestCase):
         logger.set_logger(stream=io.StringIO())
 
         config = yaml.load(get_config_example(), Loader=yaml.Loader)
-        self.config = PlayerConfig.from_dict(config["diceplayer"])
+        self.config = PlayerConfig.model_validate(config["diceplayer"])
 
     def test_class_instantiation(self):
         gaussian_interface = GaussianInterface()