diff --git a/pyproject.toml b/pyproject.toml
index 20b666796..7f6eaef8b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,7 +52,7 @@ Changelog = "https://github.com/langfuse/langfuse-python/releases"
 
 [dependency-groups]
 dev = [
-    "pytest>=7.4,<9.0",
+    "pytest>=7.4,<10.0",
     "pytest-timeout>=2.1.0,<3",
     "pytest-xdist>=3.3.1,<4",
     "pre-commit>=3.2.2,<4",
diff --git a/uv.lock b/uv.lock
index 868e59aa4..90a07db72 100644
--- a/uv.lock
+++ b/uv.lock
@@ -770,7 +770,7 @@ dev = [
     { name = "openai", specifier = ">=1.0.0" },
     { name = "opentelemetry-instrumentation-threading", specifier = ">=0.59b0,<1" },
     { name = "pre-commit", specifier = ">=3.2.2,<4" },
-    { name = "pytest", specifier = ">=7.4,<9.0" },
+    { name = "pytest", specifier = ">=7.4,<10.0" },
     { name = "pytest-asyncio", specifier = ">=0.21.1,<1.2.0" },
     { name = "pytest-httpserver", specifier = ">=1.0.8,<2" },
     { name = "pytest-timeout", specifier = ">=2.1.0,<3" },
@@ -1729,7 +1729,7 @@ wheels = [
 
 [[package]]
 name = "pytest"
-version = "8.4.2"
+version = "9.1.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "colorama", marker = "sys_platform == 'win32'" },
@@ -1738,21 +1738,21 @@ dependencies = [
     { name = "pluggy" },
     { name = "pygments" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/a3/5c/00a0e072241553e1a7496d638deababa67c5058571567b92a7eaa258397c/pytest-8.4.2.tar.gz", hash = "sha256:86c0d0b93306b961d58d62a4db4879f27fe25513d4b969df351abdddb3c30e01", size = 1519618, upload-time = "2025-09-04T14:34:22.711Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/e4/47/b9efed96c114afcfa3c9d3fe98a76a1d14c74a9e266d397cf6eb64be5e01/pytest-9.1.1.tar.gz", hash = "sha256:1088fbde8f2b49d95a549a195707afa7a76a3ce9bcadc26b6d71f0ffda5fe313", size = 1636369, upload-time = "2026-06-19T10:58:32.857Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/a8/a4/20da314d277121d6534b3a980b29035dcd51e6744bd79075a6ce8fa4eb8d/pytest-8.4.2-py3-none-any.whl", hash = "sha256:872f880de3fc3a5bdc88a11b39c9710c3497a547cfa9320bc3c5e62fbf272e79", size = 365750, upload-time = "2025-09-04T14:34:20.226Z" },
+    { url = "https://files.pythonhosted.org/packages/24/25/1de2678b631f5a49215c6c96fff41ba892b0a34df68d6d80292b1b48aa7f/pytest-9.1.1-py3-none-any.whl", hash = "sha256:37a86b45efb9a47a61a36449063e8e18d0cab3161329fc099eb21783169c4f0c", size = 386536, upload-time = "2026-06-19T10:58:31.347Z" },
 ]
 
 [[package]]
 name = "pytest-asyncio"
-version = "1.1.1"
+version = "0.23.3"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "pytest" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/8d/1e/2aa43805d4a320a9489d2b99f7877b69f9094c79aa0732159a1415dd6cd4/pytest_asyncio-1.1.1.tar.gz", hash = "sha256:b72d215c38e2c91dbb32f275e0b5be69602d7869910e109360e375129960a649", size = 46590, upload-time = "2025-09-12T06:36:20.834Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/1d/27/f036ec4bcbfd056c54572d7169ba3dbb54e7181f02f21caadd3aecb9cf5b/pytest-asyncio-0.23.3.tar.gz", hash = "sha256:af313ce900a62fbe2b1aed18e37ad757f1ef9940c6b6a88e2954de38d6b1fb9f", size = 44841, upload-time = "2024-01-01T14:03:58.77Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/28/de/aba79e9ccdb51b5d0d65c67dd857bd78b00c64723df16b9fc800d8b94ce6/pytest_asyncio-1.1.1-py3-none-any.whl", hash = "sha256:726339d30fcfde24691f589445b9b67d058b311ac632b1d704e97f20f1d878da", size = 14719, upload-time = "2025-09-12T06:36:19.726Z" },
+    { url = "https://files.pythonhosted.org/packages/1d/d6/568f370599c794cc97e2f36293e06ee9bd5bd3a2d2eb62525671425d266b/pytest_asyncio-0.23.3-py3-none-any.whl", hash = "sha256:37a9d912e8338ee7b4a3e917381d1c95bfc8682048cb0fbc35baba316ec1faba", size = 17383, upload-time = "2024-01-01T14:03:56.293Z" },
 ]
 
 [[package]]