diff --git a/pyproject.toml b/pyproject.toml
index de1572472..c07b7f47c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -75,7 +75,7 @@ dev = [
     "rich==15.0.0",
     "ruff==0.15.12",
     "types-PyYAML==6.0.12.20260518",
-    "types-python-dateutil==2.9.0.20260408",
+    "types-python-dateutil==2.9.0.20260518",
     "types-python-slugify==8.0.2.20240310",
     "types-requests==2.33.0.20260518",
     "types-urllib3==1.26.25.14",
diff --git a/uv.lock b/uv.lock
index 6d13f14bf..b63404a99 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1038,7 +1038,7 @@ dev = [
     { name = "pytest-asyncio", specifier = "==1.3.0" },
     { name = "rich", specifier = "==15.0.0" },
     { name = "ruff", specifier = "==0.15.12" },
-    { name = "types-python-dateutil", specifier = "==2.9.0.20260408" },
+    { name = "types-python-dateutil", specifier = "==2.9.0.20260518" },
     { name = "types-python-slugify", specifier = "==8.0.2.20240310" },
     { name = "types-pyyaml", specifier = "==6.0.12.20260518" },
     { name = "types-requests", specifier = "==2.33.0.20260518" },
@@ -1950,11 +1950,11 @@ wheels = [
 
 [[package]]
 name = "types-python-dateutil"
-version = "2.9.0.20260408"
+version = "2.9.0.20260518"
 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/8d/e8/c01bdf0d7c3659428c091fbd693177093639565bcbc86bc20098e6d37cc6/types_python_dateutil-2.9.0.20260518.tar.gz", hash = "sha256:51f02dc03b61c7f6a07df45797d4dfe8a1aa47f0b7db9ad89f6fd3a1a70e1b51", size = 17082, upload-time = "2026-05-18T06:05:24.508Z" }
 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/36/22/169273273ca34e9ab0ae2f387ba72ed7e09faaaf834da01d6b89c2bea71a/types_python_dateutil-2.9.0.20260518-py3-none-any.whl", hash = "sha256:d6a9c5bd0de61460c8fdef8ab2b400f956a1a1075cce08d4e2b4434e478c50b8", size = 18431, upload-time = "2026-05-18T06:05:23.641Z" },
 ]
 
 [[package]]