diff --git a/poetry.lock b/poetry.lock
index 661542f..7b06a86 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1304,21 +1304,21 @@ diagrams = ["jinja2", "railroad-diagrams"]
 
 [[package]]
 name = "pytest"
-version = "8.4.2"
+version = "9.0.2"
 description = "pytest: simple powerful testing with Python"
 optional = false
-python-versions = ">=3.9"
+python-versions = ">=3.10"
 groups = ["main", "dev"]
 files = [
-    {file = "pytest-8.4.2-py3-none-any.whl", hash = "sha256:872f880de3fc3a5bdc88a11b39c9710c3497a547cfa9320bc3c5e62fbf272e79"},
-    {file = "pytest-8.4.2.tar.gz", hash = "sha256:86c0d0b93306b961d58d62a4db4879f27fe25513d4b969df351abdddb3c30e01"},
+    {file = "pytest-9.0.2-py3-none-any.whl", hash = "sha256:711ffd45bf766d5264d487b917733b453d917afd2b0ad65223959f59089f875b"},
+    {file = "pytest-9.0.2.tar.gz", hash = "sha256:75186651a92bd89611d1d9fc20f0b4345fd827c41ccd5c299a868a05d70edf11"},
 ]
 
 [package.dependencies]
 colorama = {version = ">=0.4", markers = "sys_platform == \"win32\""}
 exceptiongroup = {version = ">=1", markers = "python_version < \"3.11\""}
-iniconfig = ">=1"
-packaging = ">=20"
+iniconfig = ">=1.0.1"
+packaging = ">=22"
 pluggy = ">=1.5,<2"
 pygments = ">=2.7.2"
 tomli = {version = ">=1", markers = "python_version < \"3.11\""}
@@ -1597,4 +1597,4 @@ test = ["covdefaults (>=2.3)", "coverage (>=7.2.7)", "coverage-enable-subprocess
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.10,<3.14"
-content-hash = "49e2d076fb0de32ccdefcc4c1175cc18d08cf9eff50c42d2866aceeb27f042b1"
+content-hash = "49e57e618433c5b47e46fcc93ca9adf3ff6a7564c4b609757300ef92927170da"
diff --git a/pyproject.toml b/pyproject.toml
index 98b221e..3fbaf68 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ python = ">=3.10,<3.14"
 nexusformat = ">=1.0.6,<3.0.0"
 pydantic = "^2.0"
 pandas = "^2.2.2"
-pytest = "^8.3.4"
+pytest = ">=8.3.4,<10.0.0"
 seaborn = "^0.13.2"
 
 [tool.poetry.group.dev.dependencies]