diff --git a/pyproject.toml b/pyproject.toml
index 98930a26..cc7a2a83 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,7 +53,7 @@ dev = [
     "pytest-asyncio==1.3.0",
     "types-certifi==2021.10.8.3",
     "types-chardet==5.0.4.6",
-    "types-python-dateutil==2.9.0.20260408",
+    "types-python-dateutil==2.9.0.20260508",
     "types-PyYAML==6.0.12.20250915",
     "ruff==0.15.12",
     "types-ujson==5.10.0.20250822",
diff --git a/uv.lock b/uv.lock
index fea7202f..c1e80b7b 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1628,7 +1628,7 @@ dev = [
     { name = "ty", specifier = "==0.0.34" },
     { name = "types-certifi", specifier = "==2021.10.8.3" },
     { name = "types-chardet", specifier = "==5.0.4.6" },
-    { name = "types-python-dateutil", specifier = "==2.9.0.20260408" },
+    { name = "types-python-dateutil", specifier = "==2.9.0.20260508" },
     { name = "types-pyyaml", specifier = "==6.0.12.20250915" },
     { name = "types-ujson", specifier = "==5.10.0.20250822" },
     { name = "wheel", specifier = "==0.47.0" },
@@ -1693,11 +1693,11 @@ wheels = [
 
 [[package]]
 name = "types-python-dateutil"
-version = "2.9.0.20260408"
+version = "2.9.0.20260508"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/88/f3/2427775f80cd5e19a0a71ba8e5ab7645a01a852f43a5fd0ffc24f66338e0/types_python_dateutil-2.9.0.20260408.tar.gz", hash = "sha256:8b056ec01568674235f64ecbcef928972a5fac412f5aab09c516dfa2acfbb582", size = 16981, upload-time = "2026-04-08T04:28:10.995Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/bd/9b/ee1674cbe9ec50bb824f35a5dc0ce5fd1f1b6196ba1213e3fe6f33b4ce32/types_python_dateutil-2.9.0.20260508.tar.gz", hash = "sha256:596a6d63d81f587bf04c8254fb78df9d2344e915ce67948d7400512e3a6206d5", size = 17033, upload-time = "2026-05-08T04:47:08.248Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/fd/c6/eeba37bfee282a6a97f889faef9352d6172c6a5088eb9a4daf570d9d748d/types_python_dateutil-2.9.0.20260408-py3-none-any.whl", hash = "sha256:473139d514a71c9d1fbd8bb328974bedcb1cc3dba57aad04ffa4157f483c216f", size = 18437, upload-time = "2026-04-08T04:28:10.095Z" },
+    { url = "https://files.pythonhosted.org/packages/db/7c/1788ff10edf56031d74ad3fba40947e0e8b82e3a529b30e6b7d71c191dec/types_python_dateutil-2.9.0.20260508-py3-none-any.whl", hash = "sha256:bfc6fd2d81aa86e5ac97206a64304f6bd247426eedbca9b98619bbc48c6a1c10", size = 18425, upload-time = "2026-05-08T04:47:07.207Z" },
 ]
 
 [[package]]