diff --git a/poetry.lock b/poetry.lock
index 6221e35..85dbd70 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -156,6 +156,7 @@ description = "Fundamental package for array computing in Python"
 optional = false
 python-versions = ">=3.10"
 groups = ["main"]
+markers = "python_version < \"3.13\""
 files = [
     {file = "numpy-2.2.6-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:b412caa66f72040e6d268491a59f2c43bf03eb6c96dd8f0307829feb7fa2b6fb"},
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@@ -214,6 +215,91 @@ files = [
     {file = "numpy-2.2.6.tar.gz", hash = "sha256:e29554e2bef54a90aa5cc07da6ce955accb83f21ab5de01a62c8478897b264fd"},
 ]
 
+[[package]]
+name = "numpy"
+version = "2.3.5"
+description = "Fundamental package for array computing in Python"
+optional = false
+python-versions = ">=3.11"
+groups = ["main"]
+markers = "python_version >= \"3.13\""
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+    {file = "numpy-2.3.5-pp311-pypy311_pp73-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:ffac52f28a7849ad7576293c0cb7b9f08304e8f7d738a8cb8a90ec4c55a998eb"},
+    {file = "numpy-2.3.5-pp311-pypy311_pp73-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:63c0e9e7eea69588479ebf4a8a270d5ac22763cc5854e9a7eae952a3908103f7"},
+    {file = "numpy-2.3.5-pp311-pypy311_pp73-win_amd64.whl", hash = "sha256:f16417ec91f12f814b10bafe79ef77e70113a2f5f7018640e7425ff979253425"},
+    {file = "numpy-2.3.5.tar.gz", hash = "sha256:784db1dcdab56bf0517743e746dfb0f885fc68d948aba86eeec2cba234bdf1c0"},
+]
+
 [[package]]
 name = "packaging"
 version = "25.0"
@@ -316,5 +402,5 @@ files = [
 
 [metadata]
 lock-version = "2.1"
-python-versions = ">=3.10, <3.15"
-content-hash = "a5e185cb39a3abbc2eff0db826d58e1e04bdf7f4d0d31dd0f1f180d2156fdd89"
+python-versions = ">=3.10,<3.15"
+content-hash = "a25a14992ecc5245a7d629cec89116ce01b0770e2b79462a0056192f0000464e"
diff --git a/pyproject.toml b/pyproject.toml
index 3d353ed..cb26d1b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,23 +1,31 @@
-[tool.poetry]
+[project]
 name = "astarsample"
-version = "0.4a3"
+version = "0.4a4"
 description = "Example project"
-readme = "README.md"
+authors = [
+    { name = "Hugo Buddelmeijer", email = "hugo@buddelmeijer.nl" }
+]
 license = "GPL-3.0-or-later"
-authors = ["Hugo Buddelmeijer <hugo@buddelmeijer.nl>"]
+readme = "README.md"
+maintainers = [
+    { name = "Kieran Leschinski", email = "kieran.leschinski@unive.ac.at" },
+    { name = "Hugo Buddelmeijer", email = "hugo@buddelmeijer.nl" },
+    { name = "Oliver Czoske", email = "oliver.czoske@univie.ac.at" },
+    { name = "Fabian Haberhauer", email = "fabian.haberhauer@univie.ac.at" },
+]
+requires-python = ">=3.10,<3.15"
+dependencies = [
+    "numpy (>=1.26.4,<2.3.0) ; python_version >= '3.10' and python_version < '3.13'",
+    "numpy (>=2.3.5,<3.0.0) ; python_version >= '3.13'",
+]
 
+[tool.poetry]
 packages = [{include = "sample"}]
 
-[tool.poetry.dependencies]
-# When updating the version, also update the versions in .github/workflows/*
-# and also re-run "poetry lock --no-update" and commit the changed lock file
-python = ">=3.10, <3.15"
-numpy = ">=2.1.0,<2.4.0"
-
 [tool.poetry.group.test.dependencies]
 pytest = "^9.0.2"
 pytest-cov = "^7.0.0"
 
 [build-system]
-requires = ["poetry-core"]
+requires = ["poetry-core>=2.0.0,<3.0.0"]
 build-backend = "poetry.core.masonry.api"