diff --git a/pyproject.toml b/pyproject.toml
index 529bd20bb173163ce8d66e8dbb0150781050cbac..03069ec5022f255f95cddc39f54ed7dc914b815c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,6 +5,19 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "zlib-into"
 version = "0.1"
+description = "Compress & decompress data with zlib into preallocated buffers"
+readme = "README.rst"
+authors = [
+  {name = "European XFEL GmbH", email = "da-support@xfel.eu"}
+]
+classifiers = [
+  "License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)",
+  "Topic :: System :: Archiving :: Compression",
+]
+requires-python = ">=3.11"
+
+[project.urls]
+Source = "https://git.xfel.eu/kluyvert/zlib_into"
 
 [tool.setuptools]
 ext-modules = [