diff --git a/poetry.lock b/poetry.lock
index be43bff3..3fce8a09 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 2.1.4 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.2.1 and should not be changed by hand.
 
 [[package]]
 name = "anyascii"
@@ -1680,20 +1680,20 @@ diagrams = ["jinja2", "railroad-diagrams"]
 
 [[package]]
 name = "pytest"
-version = "8.4.2"
+version = "9.0.3"
 description = "pytest: simple powerful testing with Python"
 optional = false
-python-versions = ">=3.9"
+python-versions = ">=3.10"
 groups = ["main"]
 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-9.0.3-py3-none-any.whl", hash = "sha256:2c5efc453d45394fdd706ade797c0a81091eccd1d6e4bccfcd476e2b8e0ab5d9"},
+    {file = "pytest-9.0.3.tar.gz", hash = "sha256:b86ada508af81d19edeb213c681b1d48246c1a91d304c6c81a427674c17eb91c"},
 ]
 
 [package.dependencies]
 colorama = {version = ">=0.4", markers = "sys_platform == \"win32\""}
-iniconfig = ">=1"
-packaging = ">=20"
+iniconfig = ">=1.0.1"
+packaging = ">=22"
 pluggy = ">=1.5,<2"
 pygments = ">=2.7.2"
 
@@ -2555,4 +2555,4 @@ scikit-learn = ["scikit-learn"]
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.11,<3.13"
-content-hash = "6697ef1fac9e13c0441b975d31d062222945bb8a35ce63d4d4d14de76951dbb5"
+content-hash = "953b75b0add94f356155ee182e2a5d1306362304bdb5cff6b47108896dc4ec63"
diff --git a/pyproject.toml b/pyproject.toml
index 4a46bdb7..2232c422 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ homepage = "https://github.com/KnowledgeCaptureAndDiscovery/somef"
     contractions = "^0.1.73"
     chardet = "^5.2.0"
     imbalanced-learn = "^0.12.0"
-    pytest = "^8.0.0"
+    pytest = ">=8,<10"
     morph-kgc = "^2.7.0"
     bibtexparser = "^1.4.1"
     nbformat = "^5.9.2"