diff --git a/compose_viz/spec/compose_spec.py b/compose_viz/spec/compose_spec.py
index 0880ac6..24caa0b 100644
--- a/compose_viz/spec/compose_spec.py
+++ b/compose_viz/spec/compose_spec.py
@@ -7,10 +7,11 @@ from __future__ import annotations
 from enum import Enum
 from typing import Any, Dict, List, Optional, Union
 
-from pydantic import BaseModel, Extra, Field, conint, constr
+from pydantic import Extra, Field, conint, constr
+from pydantic_yaml import YamlModel
 
 
-class CredentialSpec(BaseModel):
+class CredentialSpec(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -25,14 +26,14 @@ class Condition(Enum):
     service_completed_successfully = "service_completed_successfully"
 
 
-class DependsOn(BaseModel):
+class DependsOn(YamlModel):
     class Config:
         extra = Extra.forbid
 
     condition: Condition
 
 
-class Extend(BaseModel):
+class Extend(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -40,7 +41,7 @@ class Extend(BaseModel):
     file: Optional[str] = None
 
 
-class Logging(BaseModel):
+class Logging(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -48,7 +49,7 @@ class Logging(BaseModel):
     options: Optional[Dict[constr(regex=r"^.+$"), Optional[Union[str, float]]]] = None  # type: ignore  # noqa: F722
 
 
-class Port(BaseModel):
+class Port(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -67,7 +68,7 @@ class PullPolicy(Enum):
     missing = "missing"
 
 
-class Ulimit(BaseModel):
+class Ulimit(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -80,7 +81,7 @@ class Selinux(Enum):
     Z = "Z"
 
 
-class Bind(BaseModel):
+class Bind(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -89,14 +90,14 @@ class Bind(BaseModel):
     selinux: Optional[Selinux] = None
 
 
-class AdditionalVolumeOption(BaseModel):
+class AdditionalVolumeOption(YamlModel):
     class Config:
         extra = Extra.forbid
 
     nocopy: Optional[bool] = None
 
 
-class Tmpfs(BaseModel):
+class Tmpfs(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -104,7 +105,7 @@ class Tmpfs(BaseModel):
     mode: Optional[float] = None
 
 
-class ServiceVolume(BaseModel):
+class ServiceVolume(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -118,7 +119,7 @@ class ServiceVolume(BaseModel):
     tmpfs: Optional[Tmpfs] = None
 
 
-class Healthcheck(BaseModel):
+class Healthcheck(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -135,7 +136,7 @@ class Order(Enum):
     stop_first = "stop-first"
 
 
-class RollbackConfig(BaseModel):
+class RollbackConfig(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -152,7 +153,7 @@ class ConfigOrder(Enum):
     stop_first = "stop-first"
 
 
-class UpdateConfig(BaseModel):
+class UpdateConfig(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -164,7 +165,7 @@ class UpdateConfig(BaseModel):
     order: Optional[ConfigOrder] = None
 
 
-class Limits(BaseModel):
+class Limits(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -173,7 +174,7 @@ class Limits(BaseModel):
     pids: Optional[int] = None
 
 
-class RestartPolicy(BaseModel):
+class RestartPolicy(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -183,14 +184,14 @@ class RestartPolicy(BaseModel):
     window: Optional[str] = None
 
 
-class Preference(BaseModel):
+class Preference(YamlModel):
     class Config:
         extra = Extra.forbid
 
     spread: Optional[str] = None
 
 
-class Placement(BaseModel):
+class Placement(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -199,7 +200,7 @@ class Placement(BaseModel):
     max_replicas_per_node: Optional[int] = None
 
 
-class DiscreteResourceSpec(BaseModel):
+class DiscreteResourceSpec(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -207,18 +208,18 @@ class DiscreteResourceSpec(BaseModel):
     value: Optional[float] = None
 
 
-class GenericResource(BaseModel):
+class GenericResource(YamlModel):
     class Config:
         extra = Extra.forbid
 
     discrete_resource_spec: Optional[DiscreteResourceSpec] = None
 
 
-class GenericResources(BaseModel):
+class GenericResources(YamlModel):
     __root__: List[GenericResource]
 
 
-class ConfigItem(BaseModel):
+class ConfigItem(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -228,7 +229,7 @@ class ConfigItem(BaseModel):
     aux_addresses: Optional[Dict[constr(regex=r"^.+$"), str]] = None  # type: ignore  # noqa: F722
 
 
-class Ipam(BaseModel):
+class Ipam(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -237,37 +238,37 @@ class Ipam(BaseModel):
     options: Optional[Dict[constr(regex=r"^.+$"), str]] = None  # type: ignore  # noqa: F722
 
 
-class ExternalNetwork(BaseModel):
+class ExternalNetwork(YamlModel):
     class Config:
         extra = Extra.forbid
 
     name: Optional[str] = None
 
 
-class ExternalVolume(BaseModel):
+class ExternalVolume(YamlModel):
     class Config:
         extra = Extra.forbid
 
     name: Optional[str] = None
 
 
-class ExternalSecret(BaseModel):
+class ExternalSecret(YamlModel):
     name: Optional[str] = None
 
 
-class ExternalConfig(BaseModel):
+class ExternalConfig(YamlModel):
     name: Optional[str] = None
 
 
-class ListOfStrings(BaseModel):
+class ListOfStrings(YamlModel):
     __root__: List[str] = Field(..., unique_items=True)
 
 
-class ListOrDict(BaseModel):
+class ListOrDict(YamlModel):
     __root__: Union[Dict[constr(regex=r".+"), Optional[Union[str, float, bool]]], List[str]]  # type: ignore  # noqa: F722, E501
 
 
-class BlkioLimit(BaseModel):
+class BlkioLimit(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -275,7 +276,7 @@ class BlkioLimit(BaseModel):
     rate: Optional[Union[int, str]] = None
 
 
-class BlkioWeight(BaseModel):
+class BlkioWeight(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -283,7 +284,7 @@ class BlkioWeight(BaseModel):
     weight: Optional[int] = None
 
 
-class ServiceConfigOrSecretItem(BaseModel):
+class ServiceConfigOrSecretItem(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -294,15 +295,15 @@ class ServiceConfigOrSecretItem(BaseModel):
     mode: Optional[float] = None
 
 
-class ServiceConfigOrSecret(BaseModel):
+class ServiceConfigOrSecret(YamlModel):
     __root__: List[Union[str, ServiceConfigOrSecretItem]]
 
 
-class Constraints(BaseModel):
+class Constraints(YamlModel):
     __root__: Any
 
 
-class BuildItem(BaseModel):
+class BuildItem(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -324,7 +325,7 @@ class BuildItem(BaseModel):
     tags: Optional[List[str]] = None
 
 
-class BlkioConfig(BaseModel):
+class BlkioConfig(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -336,7 +337,7 @@ class BlkioConfig(BaseModel):
     weight_device: Optional[List[BlkioWeight]] = None
 
 
-class ServiceNetwork(BaseModel):
+class ServiceNetwork(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -347,7 +348,7 @@ class ServiceNetwork(BaseModel):
     priority: Optional[float] = None
 
 
-class Device(BaseModel):
+class Device(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -358,11 +359,11 @@ class Device(BaseModel):
     options: Optional[ListOrDict] = None
 
 
-class Devices(BaseModel):
+class Devices(YamlModel):
     __root__: List[Device]
 
 
-class Network(BaseModel):
+class Network(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -377,7 +378,7 @@ class Network(BaseModel):
     labels: Optional[ListOrDict] = None
 
 
-class Volume(BaseModel):
+class Volume(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -388,7 +389,7 @@ class Volume(BaseModel):
     labels: Optional[ListOrDict] = None
 
 
-class Secret(BaseModel):
+class Secret(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -401,7 +402,7 @@ class Secret(BaseModel):
     template_driver: Optional[str] = None
 
 
-class Config(BaseModel):
+class Config(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -412,11 +413,11 @@ class Config(BaseModel):
     template_driver: Optional[str] = None
 
 
-class StringOrList(BaseModel):
+class StringOrList(YamlModel):
     __root__: Union[str, ListOfStrings]
 
 
-class Reservations(BaseModel):
+class Reservations(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -426,7 +427,7 @@ class Reservations(BaseModel):
     devices: Optional[Devices] = None
 
 
-class Resources(BaseModel):
+class Resources(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -434,7 +435,7 @@ class Resources(BaseModel):
     reservations: Optional[Reservations] = None
 
 
-class Deployment(BaseModel):
+class Deployment(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -449,7 +450,7 @@ class Deployment(BaseModel):
     placement: Optional[Placement] = None
 
 
-class Service(BaseModel):
+class Service(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -534,7 +535,7 @@ class Service(BaseModel):
     working_dir: Optional[str] = None
 
 
-class ComposeSpecification(BaseModel):
+class ComposeSpecification(YamlModel):
     class Config:
         extra = Extra.forbid
 
@@ -544,7 +545,7 @@ class ComposeSpecification(BaseModel):
         description="define the Compose project name, until user defines one explicitly.",
     )
     services: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Service]] = None  # type: ignore  # noqa: F722
-    networks: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Network]] = None  # type: ignore  # noqa: F722
-    volumes: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Volume]] = None  # type: ignore  # noqa: F722
+    networks: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Optional[Network]]] = None  # type: ignore  # noqa: F722
+    volumes: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Optional[Volume]]] = None  # type: ignore  # noqa: F722
     secrets: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Secret]] = None  # type: ignore  # noqa: F722
     configs: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Config]] = None  # type: ignore  # noqa: F722
diff --git a/poetry.lock b/poetry.lock
index 6043af8..98e1ba4 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -61,6 +61,20 @@ tomli = {version = "*", optional = true, markers = "extra == \"toml\""}
 [package.extras]
 toml = ["tomli"]
 
+[[package]]
+name = "deprecated"
+version = "1.2.13"
+description = "Python @deprecated decorator to deprecate old python classes, functions or methods."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+wrapt = ">=1.10,<2"
+
+[package.extras]
+dev = ["tox", "bump2version (<1)", "sphinx (<2)", "importlib-metadata (<3)", "importlib-resources (<4)", "configparser (<5)", "sphinxcontrib-websupport (<2)", "zipp (<2)", "PyTest (<5)", "PyTest-Cov (<2.6)", "pytest", "pytest-cov"]
+
 [[package]]
 name = "distlib"
 version = "0.3.4"
@@ -180,6 +194,41 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package]]
+name = "pydantic"
+version = "1.9.1"
+description = "Data validation and settings management using python type hints"
+category = "main"
+optional = false
+python-versions = ">=3.6.1"
+
+[package.dependencies]
+typing-extensions = ">=3.7.4.3"
+
+[package.extras]
+dotenv = ["python-dotenv (>=0.10.4)"]
+email = ["email-validator (>=1.0.3)"]
+
+[[package]]
+name = "pydantic-yaml"
+version = "0.6.3"
+description = "\"Adds some YAML functionality to the excellent `pydantic` library.\""
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+deprecated = ">=1.2.5,<1.3.0"
+pydantic = ">=1.7.4,<2.0"
+semver = ">=2.13.0,<4"
+types-Deprecated = "*"
+
+[package.extras]
+dev = ["black", "flake8", "bump2version", "pytest", "mypy"]
+docs = ["mkdocs", "mkdocs-material", "mkdocstrings", "pymdown-extensions", "pygments"]
+pyyaml = ["pyyaml", "types-pyyaml"]
+ruamel = ["ruamel.yaml (>=0.15,<0.18)"]
+
 [[package]]
 name = "pyparsing"
 version = "3.0.8"
@@ -258,6 +307,14 @@ category = "main"
 optional = false
 python-versions = ">=3.5"
 
+[[package]]
+name = "semver"
+version = "2.13.0"
+description = "Python helper for Semantic Versioning (http://semver.org/)"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
 [[package]]
 name = "six"
 version = "1.16.0"
@@ -299,6 +356,22 @@ dev = ["autoflake (>=1.3.1,<2.0.0)", "flake8 (>=3.8.3,<4.0.0)"]
 doc = ["mkdocs (>=1.1.2,<2.0.0)", "mkdocs-material (>=8.1.4,<9.0.0)", "mdx-include (>=1.4.1,<2.0.0)"]
 test = ["shellingham (>=1.3.0,<2.0.0)", "pytest (>=4.4.0,<5.4.0)", "pytest-cov (>=2.10.0,<3.0.0)", "coverage (>=5.2,<6.0)", "pytest-xdist (>=1.32.0,<2.0.0)", "pytest-sugar (>=0.9.4,<0.10.0)", "mypy (==0.910)", "black (>=22.3.0,<23.0.0)", "isort (>=5.0.6,<6.0.0)"]
 
+[[package]]
+name = "types-deprecated"
+version = "1.2.8"
+description = "Typing stubs for Deprecated"
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "typing-extensions"
+version = "4.2.0"
+description = "Backported and Experimental Type Hints for Python 3.7+"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
 [[package]]
 name = "virtualenv"
 version = "20.14.1"
@@ -317,10 +390,18 @@ six = ">=1.9.0,<2"
 docs = ["proselint (>=0.10.2)", "sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=21.3)"]
 testing = ["coverage (>=4)", "coverage-enable-subprocess (>=1)", "flaky (>=3)", "pytest (>=4)", "pytest-env (>=0.6.2)", "pytest-freezegun (>=0.4.1)", "pytest-mock (>=2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "packaging (>=20.0)"]
 
+[[package]]
+name = "wrapt"
+version = "1.14.1"
+description = "Module for decorators, wrappers and monkey patching."
+category = "main"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "e1b68a4c83f398e841e6f38823ea18f3cb27b0b251689d0398ae39c03ddc4a47"
+content-hash = "e7a6c60bfd8d85b8dce3e04a4ad0776a106a4ec18483787f93d29a738efd0700"
 
 [metadata.files]
 atomicwrites = [
@@ -386,6 +467,10 @@ coverage = [
     {file = "coverage-6.3.3-pp36.pp37.pp38-none-any.whl", hash = "sha256:d522f1dc49127eab0bfbba4e90fa068ecff0899bbf61bf4065c790ddd6c177fe"},
     {file = "coverage-6.3.3.tar.gz", hash = "sha256:2781c43bffbbec2b8867376d4d61916f5e9c4cc168232528562a61d1b4b01879"},
 ]
+deprecated = [
+    {file = "Deprecated-1.2.13-py2.py3-none-any.whl", hash = "sha256:64756e3e14c8c5eea9795d93c524551432a0be75629f8f29e67ab8caf076c76d"},
+    {file = "Deprecated-1.2.13.tar.gz", hash = "sha256:43ac5335da90c31c24ba028af536a91d41d53f9e6901ddb021bcc572ce44e38d"},
+]
 distlib = [
     {file = "distlib-0.3.4-py2.py3-none-any.whl", hash = "sha256:6564fe0a8f51e734df6333d08b8b94d4ea8ee6b99b5ed50613f731fd4089f34b"},
     {file = "distlib-0.3.4.zip", hash = "sha256:e4b58818180336dc9c529bfb9a0b58728ffc09ad92027a3f30b7cd91e3458579"},
@@ -430,6 +515,47 @@ py = [
     {file = "py-1.11.0-py2.py3-none-any.whl", hash = "sha256:607c53218732647dff4acdfcd50cb62615cedf612e72d1724fb1a0cc6405b378"},
     {file = "py-1.11.0.tar.gz", hash = "sha256:51c75c4126074b472f746a24399ad32f6053d1b34b68d2fa41e558e6f4a98719"},
 ]
+pydantic = [
+    {file = "pydantic-1.9.1-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:c8098a724c2784bf03e8070993f6d46aa2eeca031f8d8a048dff277703e6e193"},
+    {file = "pydantic-1.9.1-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:c320c64dd876e45254bdd350f0179da737463eea41c43bacbee9d8c9d1021f11"},
+    {file = "pydantic-1.9.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:18f3e912f9ad1bdec27fb06b8198a2ccc32f201e24174cec1b3424dda605a310"},
+    {file = "pydantic-1.9.1-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:c11951b404e08b01b151222a1cb1a9f0a860a8153ce8334149ab9199cd198131"},
+    {file = "pydantic-1.9.1-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:8bc541a405423ce0e51c19f637050acdbdf8feca34150e0d17f675e72d119580"},
+    {file = "pydantic-1.9.1-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:e565a785233c2d03724c4dc55464559639b1ba9ecf091288dd47ad9c629433bd"},
+    {file = "pydantic-1.9.1-cp310-cp310-win_amd64.whl", hash = "sha256:a4a88dcd6ff8fd47c18b3a3709a89adb39a6373f4482e04c1b765045c7e282fd"},
+    {file = "pydantic-1.9.1-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:447d5521575f18e18240906beadc58551e97ec98142266e521c34968c76c8761"},
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+    {file = "wrapt-1.14.1-cp39-cp39-win_amd64.whl", hash = "sha256:dee60e1de1898bde3b238f18340eec6148986da0455d8ba7848d50470a7a32fb"},
+    {file = "wrapt-1.14.1.tar.gz", hash = "sha256:380a85cf89e0e69b7cfbe2ea9f765f004ff419f34194018a6827ac0e3edfed4d"},
+]
diff --git a/pyproject.toml b/pyproject.toml
index f71b239..926de26 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,6 +17,7 @@ typer = "^0.4.1"
 PyYAML = "^6.0"
 graphviz = "^0.20"
 "ruamel.yaml" = "^0.17.21"
+pydantic-yaml = "^0.6.3"
 
 [tool.poetry.dev-dependencies]
 pytest = "^7.1.2"