diff --git a/poetry.lock b/poetry.lock
index adee3123..e38f16e9 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -666,13 +666,13 @@ testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "no
 
 [[package]]
 name = "python-dateutil"
-version = "2.8.2"
+version = "2.9.0"
 description = "Extensions to the standard Python datetime module"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
 files = [
-    {file = "python-dateutil-2.8.2.tar.gz", hash = "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86"},
-    {file = "python_dateutil-2.8.2-py2.py3-none-any.whl", hash = "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9"},
+    {file = "python-dateutil-2.9.0.tar.gz", hash = "sha256:78e73e19c63f5b20ffa567001531680d939dc042bf7850431877645523c66709"},
+    {file = "python_dateutil-2.9.0-py2.py3-none-any.whl", hash = "sha256:cbf2f1da5e6083ac2fbfd4da39a25f34312230110440f424a14c7558bb85d82e"},
 ]
 
 [package.dependencies]
@@ -1006,4 +1006,4 @@ testing = ["func-timeout", "jaraco.itertools", "pytest (>=4.6)", "pytest-black (
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "acb0e64f819194465f45ec52463b26a855a416c0c236e3a462adc531949be2bb"
+content-hash = "d46e9452c4a9565b941246e4c932acb41b72299eb0bea1a96a9ae861f8d7c02d"
diff --git a/pyproject.toml b/pyproject.toml
index 4602551e..911114d4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ python = "^3.9"
 # Integration tests dependencies.
 invoke = "^2.2.0"
 pytest = "^8.0.2"
-python-dateutil = "^2.8.2"
+python-dateutil = "^2.9.0"
 semver = "^3.0.2"
 
 # Documentation generation dependencies.