diff --git a/pyproject.toml b/pyproject.toml
index cb0fdc3..41a2cb3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,6 +16,8 @@ dependencies = [
     "httpx",
     "jinja2",
     "kubernetes",
+    "pydantic>=2",
+    "pydantic-settings",
     "rich",
     "sse-starlette",
     "uvicorn",
diff --git a/src/runboat/api.py b/src/runboat/api.py
index 45d0ef9..074fb31 100644
--- a/src/runboat/api.py
+++ b/src/runboat/api.py
@@ -5,7 +5,7 @@ from collections.abc import AsyncGenerator
 from ansi2html import Ansi2HTMLConverter
 from fastapi import APIRouter, Depends, HTTPException, Request, status
 from fastapi.responses import HTMLResponse
-from pydantic import BaseModel
+from pydantic import BaseModel, ConfigDict
 from sse_starlette.sse import EventSourceResponse
 from starlette.status import HTTP_404_NOT_FOUND
 
@@ -18,6 +18,8 @@ router = APIRouter()
 
 
 class Status(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
     deployed: int
     max_deployed: int
     failed: int
@@ -29,19 +31,17 @@ class Status(BaseModel):
     max_initializing: int
     undeploying: int
 
-    class Config:
-        orm_mode = True
-
 
 class Repo(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
     name: str
     link: str
 
-    class Config:
-        orm_mode = True
-
 
 class Build(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
     name: str
     commit_info: github.CommitInfo
     deploy_link: str
@@ -54,9 +54,6 @@ class Build(BaseModel):
     created: datetime.datetime
     last_scaled: datetime.datetime
 
-    class Config:
-        orm_mode = True
-
 
 class BuildEvent(BaseModel):
     event: models.BuildEvent
diff --git a/src/runboat/github.py b/src/runboat/github.py
index db388f9..63ed7ed 100644
--- a/src/runboat/github.py
+++ b/src/runboat/github.py
@@ -3,7 +3,7 @@ from enum import Enum
 from typing import Any
 
 import httpx
-from pydantic import BaseModel, validator
+from pydantic import BaseModel, field_validator
 
 from .exceptions import NotFoundOnGitHub
 from .settings import settings
@@ -32,7 +32,7 @@ class CommitInfo(BaseModel):
     pr: int | None
     git_commit: str
 
-    @validator("repo")
+    @field_validator("repo")
     def validate_repo(cls, v: str) -> str:
         return v.lower()
 
diff --git a/src/runboat/models.py b/src/runboat/models.py
index 5729b91..62475ab 100644
--- a/src/runboat/models.py
+++ b/src/runboat/models.py
@@ -5,7 +5,7 @@ from enum import Enum
 from typing import Optional
 
 from kubernetes.client.models.v1_deployment import V1Deployment
-from pydantic import BaseModel
+from pydantic import BaseModel, ConfigDict
 
 from . import github, k8s
 from .github import CommitInfo, GitHubStatusState
@@ -38,6 +38,8 @@ class BuildInitStatus(str, Enum):
 
 
 class Build(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
     name: str
     deployment_name: str
     commit_info: CommitInfo
@@ -47,9 +49,6 @@ class Build(BaseModel):
     last_scaled: datetime.datetime
     created: datetime.datetime
 
-    class Config:
-        read_with_orm_mode = True
-
     def __str__(self) -> str:
         return f"{self.slug} ({self.name})"
 
@@ -377,11 +376,10 @@ class Build(BaseModel):
 
 
 class Repo(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
     name: str
 
     @property
     def link(self) -> str:
         return f"https://github.com/{self.name}"
-
-    class Config:
-        read_with_orm_mode = True
diff --git a/src/runboat/settings.py b/src/runboat/settings.py
index 3481580..21ff68d 100644
--- a/src/runboat/settings.py
+++ b/src/runboat/settings.py
@@ -1,7 +1,9 @@
 import re
 from pathlib import Path
+from typing import Annotated
 
-from pydantic import BaseModel, BaseSettings, validator
+from pydantic import BaseModel, BeforeValidator, field_validator
+from pydantic_settings import BaseSettings, SettingsConfigDict
 
 from .exceptions import RepoOrBranchNotSupported
 
@@ -21,11 +23,7 @@ class BuildSettings(BaseModel):
     env: dict[str, str] = {}
     secret_env: dict[str, str] = {}
     template_vars: dict[str, str] = {}
-    kubefiles_path: Path | None
-
-    validate_kubefiles_path = validator("kubefiles_path", allow_reuse=True, pre=True)(
-        validate_path
-    )
+    kubefiles_path: Annotated[Path | None, BeforeValidator(validate_path)] = None
 
 
 class RepoSettings(BaseModel):
@@ -33,7 +31,7 @@ class RepoSettings(BaseModel):
     branch: str  # regex
     builds: list[BuildSettings]
 
-    @validator("builds")
+    @field_validator("builds")
     def validate_builds(cls, v: list[BuildSettings]) -> list[BuildSettings]:
         if len(v) != 1:
             raise ValueError(
@@ -43,6 +41,8 @@ class RepoSettings(BaseModel):
 
 
 class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_prefix="RUNBOAT_")
+
     # Configuration for supported repositories and branches.
     repos: list[RepoSettings]
     # A user and password to protect the most sensitive operations of the API.
@@ -67,7 +67,9 @@ class Settings(BaseSettings):
     # kubefiles.
     build_template_vars: dict[str, str] = {}
     # The path of the default kubefiles to be used.
-    build_default_kubefiles_path: Path | None
+    build_default_kubefiles_path: Annotated[
+        Path | None, BeforeValidator(validate_path)
+    ] = None
     # The token to use for the GitHub api calls (to query branches and pull requests,
     # and report build statuses).
     github_token: str | None
@@ -83,10 +85,6 @@ class Settings(BaseSettings):
     # Disable posting of statuses to GitHub commits
     disable_commit_statuses: bool = False
 
-    validate_build_default_kubefiles_path = validator(
-        "build_default_kubefiles_path", allow_reuse=True, pre=True
-    )(validate_path)
-
     def get_build_settings(self, repo: str, target_branch: str) -> list[BuildSettings]:
         for repo_settings in self.repos:
             if not re.match(repo_settings.repo, repo, re.IGNORECASE):
@@ -106,8 +104,5 @@ class Settings(BaseSettings):
         else:
             return True
 
-    class Config:
-        env_prefix = "RUNBOAT_"
-
 
 settings = Settings()