diff --git a/requirements/requirements_dep.txt b/requirements/requirements_dep.txt
index fdbdd4e0..7203c401 100644
--- a/requirements/requirements_dep.txt
+++ b/requirements/requirements_dep.txt
@@ -112,7 +112,7 @@ soupsieve==2.6
 stix2-patterns==2.0.0
 ###################################
 # arrow -> types-python-dateutil
-types-python-dateutil==2.9.0.20250822
+types-python-dateutil==2.9.0.20251115
 ###################################
 # uri-template
 # stix2-validator -> jsonschema