diff --git a/flake.lock b/flake.lock
index c5459c1..bd67c98 100644
--- a/flake.lock
+++ b/flake.lock
@@ -17,24 +17,45 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1656335358,
-        "narHash": "sha256-t0PZIFCKgjF2WQ0NC6ORigdGgLqQD3vtT+Jx/dhjNsY=",
+        "lastModified": 1754937576,
+        "narHash": "sha256-3sWA5WJybUE16kIMZ3+uxcxKZY/JRR4DFBqLdSLBo7w=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "62de360d75419386b69ea4af4a8ce104949a8242",
+        "rev": "ddae11e58c0c345bf66efbddbf2192ed0e58f896",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-22.05",
+        "ref": "nixos-25.05",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
+    "pyproject-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1754923840,
+        "narHash": "sha256-QSKpYg+Ts9HYF155ltlj40iBex39c05cpOF8gjoE2EM=",
+        "owner": "pyproject-nix",
+        "repo": "pyproject.nix",
+        "rev": "023cd4be230eacae52635be09eef100c37ef78da",
+        "type": "github"
+      },
+      "original": {
+        "owner": "pyproject-nix",
+        "repo": "pyproject.nix",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "pyproject-nix": "pyproject-nix"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index f76346d..2127165 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,42 +1,52 @@
 {
   inputs = {
     nixpkgs = {
-      url = "github:NixOS/nixpkgs/nixos-22.05";
+      url = "github:NixOS/nixpkgs/nixos-25.05";
     };
     flake-utils = {
       url = "github:numtide/flake-utils";
+    };
+    pyproject-nix = {
+      url = "github:pyproject-nix/pyproject.nix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
 
-  outputs = { self, nixpkgs, flake-utils, ... }@inputs:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    pyproject-nix,
+    ...
+  }:
+    flake-utils.lib.eachDefaultSystem (
+      system: let
         pkgs = import nixpkgs {
           inherit system;
         };
-      in
-      {
-        devShells.default =
-          let
-            python = pkgs.python310.withPackages (ps: with ps; [
-              poetry
-            ]);
-          in
+        project = pyproject-nix.lib.project.loadPyproject {
+          projectRoot = ./.;
+        };
+        python = pkgs.python3;
+      in {
+        devShells.default = let
+          arg = project.renderers.withPackages {inherit python;};
+
+          pythonEnv = python.withPackages arg;
+        in
           pkgs.mkShell {
-            buildInputs = [
-              python
+            packages = [
+              pythonEnv
+              pkgs.uv
             ];
-            shellHook = ''
-              export POETRY_VIRTUALENVS_IN_PROJECT=true
-              export PS1='\[\033[1;34m\][jtftp:\w]\$\[\033[0m\] '
-            '';
           };
         packages = {
-          jtftp = pkgs.poetry2nix.mkPoetryApplication {
-            python = pkgs.python310;
-            projectDir = ./.;
-          };
+          jtftp = let
+            attrs = project.renderers.buildPythonPackage {inherit python;};
+          in
+            python.pkgs.buildPythonPackage (attrs
+              // {
+              });
           default = self.packages.${system}.jtftp;
         };
         apps = {
diff --git a/pyproject.toml b/pyproject.toml
index e58da81..0531a62 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,26 +1,10 @@
-[tool.poetry]
+[project]
 name = "jtftp"
 version = "0.1.0"
 description = "Jeff's TFTP"
-authors = ["Jeffrey C. Ollie <jeff@ocjtech.us>"]
+# authors = ["Jeffrey C. Ollie <jeff@ocjtech.us>"]
 
-[tool.poetry.dependencies]
-python = "^3.10"
-arrow = "^1.2.2"
-aiofiles = "^0.8.0"
+dependencies = ["arrow ~= 1.3.0", "aiofiles ~= 24.1.0"]
 
-[tool.poetry.dev-dependencies]
-black = "^22.6.0"
-flake8 = "^4.0.1"
-flake8-bugbear = "^22.6.22"
-hypothesis = "^6.48.2"
-pytest = "^7.1.2"
-pytest-asyncio = "^0.18.3"
-pytest-cov = "^3.0.0"
-
-[tool.poetry.scripts]
-serve = 'examples.main:serve'
-
-[build-system]
-requires = ["poetry-core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"
+[project.scripts]
+serve = "examples.main:serve"