diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 87eee0895d..63623825b8 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -26,7 +26,7 @@ jobs:
         # TODO: workaround for https://github.com/snok/install-poetry/issues/94
         uses: snok/install-poetry@v1.3.4
         with:
-          version: 1.3.1
+          version: 2.3.4
           virtualenvs-in-project: true
       - name: Install dependencies
         run: poetry install
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b016d4846..2cc6ee7def 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+- Required poetry-core 2.2+ to build https://github.com/Textualize/rich/pull/4087
+
+### Fixed
+
+- Replaced the deprecated `License` field in distribution packages with `License-Expression` https://github.com/Textualize/rich/pull/4087
+
 ## [15.0.0] - 2026-04-12
 
 ### Changed
diff --git a/poetry.lock b/poetry.lock
index 0234516312..deb46bad38 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 2.1.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.3.4 and should not be changed by hand.
 
 [[package]]
 name = "appnope"
@@ -989,6 +989,7 @@ files = [
     {file = "typing_extensions-4.13.2-py3-none-any.whl", hash = "sha256:a439e7c04b49fec3e5d3e2beaa21755cadbbdc391694e28ccdd36ca4a1408f8c"},
     {file = "typing_extensions-4.13.2.tar.gz", hash = "sha256:e6c81219bd689f51865d9e372991c540bda33a0379d5573cddb9a3a23f7caaef"},
 ]
+markers = {main = "extra == \"jupyter\" and python_version < \"3.10\""}
 
 [[package]]
 name = "virtualenv"
@@ -1043,5 +1044,5 @@ jupyter = ["ipywidgets"]
 
 [metadata]
 lock-version = "2.1"
-python-versions = ">=3.8.0"
-content-hash = "610597849eb5fb1d82cd5e647d616dd41412674d531c2f7819380bbc9b54e8e2"
+python-versions = ">=3.9.0"
+content-hash = "0e1b1f093f944ee484afd78d900ff7a679b2375321ef6ccbe16c4178c9a11067"
diff --git a/pyproject.toml b/pyproject.toml
index bc699a0b7c..e1f3b02cf9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,10 +1,8 @@
-[tool.poetry]
+[project]
 name = "rich"
-homepage = "https://github.com/Textualize/rich"
-documentation = "https://rich.readthedocs.io/en/latest/"
 version = "15.0.0"
 description = "Render rich text, tables, progress bars, syntax highlighting, markdown and more to the terminal"
-authors = ["Will McGugan <willmcgugan@gmail.com>"]
+authors = [{name = "Will McGugan", email = "willmcgugan@gmail.com"}]
 license = "MIT"
 readme = "README.md"
 classifiers = [
@@ -15,6 +13,7 @@ classifiers = [
     "Operating System :: Microsoft :: Windows",
     "Operating System :: MacOS",
     "Operating System :: POSIX :: Linux",
+    "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -23,29 +22,34 @@ classifiers = [
     "Programming Language :: Python :: 3.14",
     "Typing :: Typed",
 ]
-include = ["rich/py.typed"]
-
+requires-python = ">=3.9.0"
+dependencies = [
+    "pygments>=2.13.0,<3.0.0",
+    "markdown-it-py>=2.2.0",
+]
 
-[tool.poetry.dependencies]
-python = ">=3.9.0"
-pygments = "^2.13.0"
-ipywidgets = { version = ">=7.5.1,<9", optional = true }
-markdown-it-py = ">=2.2.0"
+[project.optional-dependencies]
+jupyter = [
+    "ipywidgets>=7.5.1,<9",
+]
 
-[tool.poetry.extras]
-jupyter = ["ipywidgets"]
+[project.urls]
+homepage = "https://github.com/Textualize/rich"
+documentation = "https://rich.readthedocs.io/en/latest/"
 
-[tool.poetry.dev-dependencies]
-pytest = "^7.0.0"
-black = "^22.6"
-mypy = "^1.11"
-pytest-cov = "^3.0.0"
-attrs = "^21.4.0"
-pre-commit = "^2.17.0"
-typing-extensions = ">=4.0.0, <5.0"
+[dependency-groups]
+dev = [
+    "pytest~=7.0",
+    "black~=22.6",
+    "mypy~=1.11",
+    "pytest-cov~=3.0",
+    "attrs~=21.4",
+    "pre-commit~=2.17",
+    "typing-extensions~=4.0",
+]
 
 [build-system]
-requires = ["poetry-core>=1.0.0"]
+requires = ["poetry-core>=2.2.0"]
 build-backend = "poetry.core.masonry.api"