diff --git a/RELEASE.md b/RELEASE.md
index 117d18b4..d4a7ed0a 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -7,7 +7,6 @@ Unless you're a core OnionShare developer making a release, you'll probably neve
 ### Update the version in these places
 
 - [ ] `cli/pyproject.toml`
-- [ ] `cli/onionshare_cli/resources/version.txt`
 - [ ] `desktop/pyproject.toml`
 - [ ] `desktop/setup.py`
 - [ ] `desktop/org.onionshare.OnionShare.appdata.xml`
@@ -118,7 +117,7 @@ In `flatpak/org.onionshare.OnionShare.yaml`:
 
   # get onionshare dependencies
   cd flatpak-build-tools/pip
-  ./flatpak-pip-generator $(../../onionshare/flatpak/poetry-to-requirements.py ../../onionshare/desktop/pyproject.toml | grep -v PySide6)
+  ./flatpak-pip-generator $(../../onionshare/flatpak/pyproject-to-requirements.py ../../onionshare/desktop/pyproject.toml | grep -v PySide6)
   ../flatpak-json2yaml.py ./python3-modules.json
   mv python3-modules.yml onionshare-desktop.yaml
   ```
@@ -285,7 +284,7 @@ Now, notarize the release. You will need an app-specific Apple ID password set u
 
 ```sh
 export APPLE_PASSWORD="changeme" # This must be an app-specific Apple ID password, not your main Apple ID password
-export VERSION=$(cat ../cli/onionshare_cli/resources/version.txt)
+export VERSION=$(cat ../cli/pyproject.toml | python -c 'import tomllib,sys;print(tomllib.load(sys.stdin)["project"]["version"])')
 
 # Notarize it
 xcrun notarytool submit --apple-id "you@example.com" --team-id 7WLJ4UBL5L --password "$APPLE_PASSWORD" --progress --wait dist/OnionShare-$VERSION.dmg
diff --git a/cli/onionshare_cli/common.py b/cli/onionshare_cli/common.py
index 16f5b2fd..8cca4cf2 100644
--- a/cli/onionshare_cli/common.py
+++ b/cli/onionshare_cli/common.py
@@ -19,6 +19,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 import base64
 import hashlib
+import importlib.metadata as importlib_metadata
 import importlib.resources as importlib_resources
 import os
 import platform
@@ -59,8 +60,7 @@ class Common:
             self.platform = "BSD"
 
         # The current version of OnionShare
-        with open(self.get_resource_path("version.txt")) as f:
-            self.version = f.read().strip()
+        self.version = importlib_metadata.version(__package__)
 
     def display_banner(self):
         """
diff --git a/cli/onionshare_cli/resources/version.txt b/cli/onionshare_cli/resources/version.txt
deleted file mode 100644
index ec1cf33c..00000000
--- a/cli/onionshare_cli/resources/version.txt
+++ /dev/null
@@ -1 +0,0 @@
-2.6.3
diff --git a/cli/pyproject.toml b/cli/pyproject.toml
index 6ee7e64a..8371479f 100644
--- a/cli/pyproject.toml
+++ b/cli/pyproject.toml
@@ -1,9 +1,16 @@
-[tool.poetry]
+[project]
 name = "onionshare_cli"
 version = "2.6.3"
-description = "OnionShare lets you securely and anonymously send and receive files. It works by starting a web server, making it accessible as a Tor onion service, and generating an unguessable web address so others can download files from you, or upload files to you. It does _not_ require setting up a separate server or using a third party file-sharing service."
-authors = ["Micah Lee <micah@micahflee.com>"]
-license = "GPLv3+"
+description = "Securely and anonymously share files, host websites, and chat with friends using the Tor network"
+requires-python = ">=3.10,<3.13"
+authors = [
+    { name = "Micah Lee", email = "micah@micahflee.com" },
+]
+maintainers = [
+    { name = "Micah Lee", email = "micah@micahflee.com" },
+]
+license = { text = "GPL-3.0-or-later" }
+keywords = [ "onion", "share", "onionshare", "tor", "anonymous", "web server" ]
 classifiers = [
     "Programming Language :: Python :: 3",
     "Framework :: Flask",
@@ -14,39 +21,58 @@ classifiers = [
     "Operating System :: OS Independent",
     "Environment :: Web Environment",
 ]
+dependencies = [
+    "click",
+    "flask == 2.3.2",
+    "flask-compress >= 1.13, < 2.0",
+    "flask-socketio == 5.3.4",
+    "psutil",
+    "pysocks",
+    "requests[socks]",
+    "unidecode",
+    "urllib3 >= 2.2.2, < 3.0",
+    "eventlet",
+    "pynacl",
+    "colorama",
+    "gevent-websocket",
+    "stem == 1.8.1",
+    "waitress >= 3.0.1, < 4.0.0",
+    "werkzeug == 3.0.6",
+    "packaging >= 24",
+    "gevent >= 23.9.1, < 24.0.0",
+    "qrcode >= 7.4.2, < 8.0.0",
+]
 
-[tool.poetry.dependencies]
-python = ">=3.10,<3.13"
-click = "*"
-flask = "2.3.2"
-flask-compress = "^1.13"
-flask-socketio = "5.3.4"
-psutil = "*"
-pysocks = "*"
-requests = {extras = ["socks"], version = "*"}
-unidecode = "*"
-urllib3 = "^2.2.2"
-eventlet = "*"
-setuptools = ">=70.0.0"
-pynacl = "*"
-colorama = "*"
-gevent-websocket = "*"
-stem = "1.8.1"
-waitress = "^3.0.1"
-werkzeug = "3.0.6"
-packaging = ">=24"
-gevent = "^23.9.1"
-wheel = "^0.41.2"
-cffi = "^1.15.1"
-cython = "^3.0.2"
-qrcode = "^7.4.2"
+[project.urls]
+homepage = "https://onionshare.org"
+repository = "https://github.com/onionshare/onionshare"
+documentation = "https://docs.onionshare.org/"
+
+[project.scripts]
+onionshare-cli = "onionshare_cli:main"
+
+[tool.setuptools]
+packages = [
+    "onionshare_cli",
+    "onionshare_cli.web",
+]
+
+[tool.setuptools.package-data]
+onionshare_cli = [
+    "resources/*",
+    "resources/static/*",
+    "resources/static/css/*",
+    "resources/static/img/*",
+    "resources/static/js/*",
+    "resources/templates/*",
+]
 
 [tool.poetry.group.dev.dependencies]
+setuptools = ">=70.0.0"
+
+[tool.poetry.group.test.dependencies]
 pytest = ">=7.2.0"
 
-[tool.poetry.scripts]
-onionshare-cli = 'onionshare_cli:main'
-
 [build-system]
-requires = ["poetry-core"]
+requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
diff --git a/cli/setup.py b/cli/setup.py
index d401afec..3ae0deaf 100644
--- a/cli/setup.py
+++ b/cli/setup.py
@@ -18,55 +18,6 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
-import os
-import setuptools
+from setuptools import setup
 
-with open(os.path.join("onionshare_cli", "resources", "version.txt")) as f:
-    version = f.read().strip()
-
-setuptools.setup(
-    name="onionshare-cli",
-    version=version,
-    long_description=(
-        "OnionShare lets you securely and anonymously send and receive files. It works by starting a web server, "
-        "making it accessible as a Tor onion service, and generating an unguessable web address so others can "
-        "download files from you, or upload files to you. It does _not_ require setting up a separate server or "
-        "using a third party file-sharing service."
-    ),
-    author="Micah Lee",
-    author_email="micah@micahflee.com",
-    maintainer="Micah Lee",
-    maintainer_email="micah@micahflee.com",
-    url="https://onionshare.org",
-    license="GPLv3",
-    keywords="onion, share, onionshare, tor, anonymous, web server",
-    classifiers=[
-        "Programming Language :: Python :: 3",
-        "Framework :: Flask",
-        "Topic :: Communications :: File Sharing",
-        "Topic :: Security :: Cryptography",
-        "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
-        "Intended Audience :: End Users/Desktop",
-        "Operating System :: OS Independent",
-        "Environment :: Web Environment",
-    ],
-    packages=[
-        "onionshare_cli",
-        "onionshare_cli.web",
-    ],
-    package_data={
-        "onionshare_cli": [
-            "resources/*",
-            "resources/static/*",
-            "resources/static/css/*",
-            "resources/static/img/*",
-            "resources/static/js/*",
-            "resources/templates/*",
-        ]
-    },
-    entry_points={
-        "console_scripts": [
-            "onionshare-cli = onionshare_cli:main",
-        ],
-    },
-)
+setup()
diff --git a/desktop/pyproject.toml b/desktop/pyproject.toml
index 595c15af..878d2128 100644
--- a/desktop/pyproject.toml
+++ b/desktop/pyproject.toml
@@ -1,31 +1,78 @@
-[tool.poetry]
+[project]
 name = "onionshare"
 version = "2.6.3"
-description = "OnionShare lets you securely and anonymously send and receive files. It works by starting a web server, making it accessible as a Tor onion service, and generating an unguessable web address so others can download files from you, or upload files to you. It does _not_ require setting up a separate server or using a third party file-sharing service."
-authors = ["Micah Lee <micah@micahflee.com>"]
-license = "GPLv3+"
+requires-python = ">=3.10,<3.13"
+description = "Securely and anonymously share files, host websites, and chat with friends using the Tor network"
+authors = [
+    { name = "Micah Lee", email = "micah@micahflee.com" },
+]
+maintainers = [
+    { name = "Micah Lee", email = "micah@micahflee.com" },
+]
+license = { text = "GPL-3.0-or-later" }
+keywords = [ "onion", "share", "onionshare", "tor", "anonymous", "web server" ]
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "Framework :: Flask",
+    "Topic :: Communications :: File Sharing",
+    "Topic :: Security :: Cryptography",
+    "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
+    "Intended Audience :: End Users/Desktop",
+    "Operating System :: OS Independent",
+    "Environment :: Web Environment",
+]
+dependencies = [
+    "PySide6 == 6.8.2.1",
+    "qrcode",
+    "werkzeug == 3.0.6",
+    "python-gnupg",
+    "onionshare_cli",
+]
+
+[project.urls]
+homepage = "https://onionshare.org"
+repository = "https://github.com/onionshare/onionshare"
+documentation = "https://docs.onionshare.org/"
+
+[project.scripts]
+onionshare = 'onionshare:main'
+onionshare-cli = "onionshare_cli:main"
+
+[tool.setuptools]
+packages = [
+    "onionshare",
+    "onionshare.tab",
+    "onionshare.tab.mode",
+    "onionshare.tab.mode.share_mode",
+    "onionshare.tab.mode.receive_mode",
+    "onionshare.tab.mode.website_mode",
+    "onionshare.tab.mode.chat_mode",
+]
+
+[tool.setuptools.package-data]
+onionshare = [
+    "resources/*",
+    "resources/images/*",
+    "resources/images/countries/*",
+    "resources/locale/*",
+    "resources/countries/*",
+]
 
 [tool.poetry.dependencies]
-python = ">=3.10,<3.13"
-onionshare_cli = {path = "../cli", develop = true}
-PySide6 = "6.8.2.1"
-qrcode = "*"
-werkzeug = "3.0.6"
-python-gnupg = "*"
+onionshare_cli = { path = "../cli", develop = true }
 
 [tool.poetry.group.dev.dependencies]
 click = "*"
 black = "*"
+cx_freeze = "7.2.9"
+importlib-metadata = "*"
+tomli = { version = "^2.0.1", python = "<3.11" }
+
+[tool.poetry.group.test.dependencies]
 pytest = "*"
 pytest-faulthandler = "*"
 pytest-qt = "*"
-cx_freeze = "7.2.9"
-importlib-metadata = "*"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
-
-[tool.poetry.scripts]
-onionshare = 'onionshare:main'
-onionshare-cli = 'onionshare_cli:main'
diff --git a/desktop/scripts/build-macos.py b/desktop/scripts/build-macos.py
index 7c709e08..3aa35b05 100644
--- a/desktop/scripts/build-macos.py
+++ b/desktop/scripts/build-macos.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 import os
+import sys
 import inspect
 import click
 import platform
@@ -8,6 +9,11 @@ import shutil
 import glob
 import itertools
 
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 from common import get_binary_arches
 
 root = os.path.dirname(
@@ -270,9 +276,10 @@ def package(app_path):
         return
 
     print("> Create DMG")
-    version_filename = f"{root}/cli/onionshare_cli/resources/version.txt"
-    with open(version_filename) as f:
-        version = f.read().strip()
+    pyproject_filename = f"{root}/cli/pyproject.toml"
+    with open(pyproject_filename, "rb") as f:
+        pyproject = tomllib.load(f)
+        version = pyproject['project']['version']
 
     os.makedirs(f"{desktop_dir}/dist", exist_ok=True)
     dmg_path = f"{desktop_dir}/dist/OnionShare-{version}.dmg"
diff --git a/desktop/scripts/build-windows.py b/desktop/scripts/build-windows.py
index 9b699918..7f263565 100644
--- a/desktop/scripts/build-windows.py
+++ b/desktop/scripts/build-windows.py
@@ -1,7 +1,6 @@
 #!/usr/bin/env python3
-from setuptools.command.build import build
-import sys
 import os
+import sys
 import inspect
 import click
 import shutil
@@ -10,6 +9,11 @@ import uuid
 import xml.etree.ElementTree as ET
 from glob import glob
 
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 root = os.path.dirname(
     os.path.dirname(
         os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
@@ -165,17 +169,13 @@ def wix_build_components_xml(root, data):
     return component_ids
 
 
-def msi_package(build_path, msi_path, product_update_code):
+def msi_package(build_path, msi_path, product_update_code, version):
     print(f"> Build the WiX file")
-    version_filename = os.path.join(
-        build_path, "lib", "onionshare_cli", "resources", "version.txt"
-    )
-    with open(version_filename) as f:
-        version = f.read().strip()
-        # change a version like 2.6.dev1 to just 2.6, for cx_Freeze's sake
-        last_digit = version[-1]
-        if version.endswith(f".dev{last_digit}"):
-            version = version[0:-5]
+
+    # change a version like 2.6.dev1 to just 2.6, for cx_Freeze's sake
+    last_digit = version[-1]
+    if version.endswith(f".dev{last_digit}"):
+        version = version[0:-5]
 
     data = {
         "id": "TARGETDIR",
@@ -428,16 +428,18 @@ def codesign(path):
 @click.argument("path")
 def package(path):
     """Build the MSI package"""
-    version_filename = os.path.join(
-        root, "cli", "onionshare_cli", "resources", "version.txt"
+    pyproject_filename = os.path.join(
+        root, "cli", "pyproject.toml"
     )
-    with open(version_filename) as f:
-        version = f.read().strip()
+    with open(pyproject_filename, "rb") as f:
+        pyproject = tomllib.load(f)
+        version = pyproject['project']['version']
 
     msi_package(
         path,
         os.path.join(desktop_dir, "dist", f"OnionShare-win64-{version}.msi"),
         "ed7f9243-3528-4b4a-b85c-9943982e75eb",
+        version
     )
 
 
diff --git a/desktop/setup-freeze.py b/desktop/setup-freeze.py
index 3f9059b5..e5702b6e 100644
--- a/desktop/setup-freeze.py
+++ b/desktop/setup-freeze.py
@@ -26,9 +26,16 @@ import cx_Freeze
 from cx_Freeze import setup, Executable
 from setuptools import find_packages
 
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 # Discover the version
-with open(os.path.join("..", "cli", "onionshare_cli", "resources", "version.txt")) as f:
-    version = f.read().strip()
+pyproject_filename = os.path.join("..", "cli", "pyproject.toml")
+with open(pyproject_filename, "rb") as f:
+    pyproject = tomllib.load(f)
+    version = pyproject['project']['version']
     # change a version like 2.6.dev1 to just 2.6, for cx_Freeze's sake
     last_digit = version[-1]
     if version.endswith(f".dev{last_digit}"):
diff --git a/desktop/setup.py b/desktop/setup.py
index 825b000c..b896fdac 100644
--- a/desktop/setup.py
+++ b/desktop/setup.py
@@ -1,53 +1,11 @@
 #!/usr/bin/env python3
 # This file is used to build the Snapcraft and Flatpak packages
-import setuptools
+from setuptools import setup
 
 # The version must be hard-coded because Snapcraft won't have access to ../cli
 version = "2.6.3"
 
-setuptools.setup(
+setup(
     name="onionshare",
     version=version,
-    long_description="Securely and anonymously share files, host websites, and chat with friends using the Tor network",
-    author="Micah Lee",
-    author_email="micah@micahflee.com",
-    maintainer="Micah Lee",
-    maintainer_email="micah@micahflee.com",
-    url="https://onionshare.org",
-    license="GPLv3",
-    keywords="onion, share, onionshare, tor, anonymous, web server",
-    classifiers=[
-        "Programming Language :: Python :: 3",
-        "Framework :: Flask",
-        "Topic :: Communications :: File Sharing",
-        "Topic :: Security :: Cryptography",
-        "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
-        "Intended Audience :: End Users/Desktop",
-        "Operating System :: OS Independent",
-        "Environment :: Web Environment",
-    ],
-    packages=[
-        "onionshare",
-        "onionshare.tab",
-        "onionshare.tab.mode",
-        "onionshare.tab.mode.share_mode",
-        "onionshare.tab.mode.receive_mode",
-        "onionshare.tab.mode.website_mode",
-        "onionshare.tab.mode.chat_mode",
-    ],
-    package_data={
-        "onionshare": [
-            "resources/*",
-            "resources/images/*",
-            "resources/images/countries/*",
-            "resources/locale/*",
-            "resources/countries/*",
-        ]
-    },
-    entry_points={
-        "console_scripts": [
-            "onionshare = onionshare:main",
-            "onionshare-cli = onionshare_cli:main",
-        ],
-    },
 )
diff --git a/docs/build.sh b/docs/build.sh
index 9019c60e..1c2b32d2 100755
--- a/docs/build.sh
+++ b/docs/build.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-VERSION=$(cat ../cli/onionshare_cli/resources/version.txt)
+VERSION=$(cat ../cli/pyproject.toml | python -c 'import tomllib,sys;print(tomllib.load(sys.stdin)["project"]["version"])')
 
 # Supported locales
 LOCALES="en sq bg zh_CN de el ga ja pl ru es tr uk"
diff --git a/flatpak/poetry-to-requirements.py b/flatpak/pyproject-to-requirements.py
old mode 100755
new mode 100644
similarity index 67%
rename from flatpak/poetry-to-requirements.py
rename to flatpak/pyproject-to-requirements.py
index 973e3c2e..b0afb3fc
--- a/flatpak/poetry-to-requirements.py
+++ b/flatpak/pyproject-to-requirements.py
@@ -1,7 +1,12 @@
 #!/usr/bin/env python3
-import toml
+import sys
 import click
 
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 
 def format_version(dep, version):
     if version == "*":
@@ -30,7 +35,7 @@ def format_version(dep, version):
 def poetry_to_requirements(pyproject_filename):
     """Convert poetry dependencies in a pyproject.toml to requirements format."""
     with open(pyproject_filename, "r") as f:
-        data = toml.load(f)
+        data = tomllib.load(f)
 
     dependencies = data.get("tool", {}).get("poetry", {}).get("dependencies", {})
 
@@ -48,5 +53,26 @@ def poetry_to_requirements(pyproject_filename):
         print(req)
 
 
+@click.command()
+@click.argument("pyproject_filename")
+def pyproject_to_requirements(pyproject_filename):
+    """Convert PEP 631 dependencies in a pyproject.toml to requirements format."""
+    with open(pyproject_filename, "r") as f:
+        data = tomllib.load(f)
+
+    dependencies = data.get("project", {}).get("dependencies", [])
+
+    requirements = []
+
+    for dep in dependencies:
+        if dep == "onionshare_cli":
+            continue
+
+        requirements.append(dependencies)
+
+    for req in requirements:
+        print(req)
+
+
 if __name__ == "__main__":
-    poetry_to_requirements()
+    pyproject_to_requirements()