diff --git a/packages/serialization/form/requirements-dev.txt b/packages/serialization/form/requirements-dev.txt
index 6c6de029..daa01b2d 100644
--- a/packages/serialization/form/requirements-dev.txt
+++ b/packages/serialization/form/requirements-dev.txt
@@ -6,4 +6,4 @@ pylint>=4.0.6,<5.0.0
 mypy>=2.1.0,<3.0.0
 pytest>=9.1.0,<10.0.0
 pytest-asyncio>=1.4.0,<1.5
-types-python-dateutil>=2.9.0.20240906,<3.0.0
+types-python-dateutil>=2.9.0.20260518,<3.0.0