diff --git a/requirements.txt b/requirements.txt
index 1ca39c1e1..e38cb50a8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,6 +35,6 @@ cotyledon>=1.7.3 # Apache-2.0
 keystoneauth1>=2.1 # Apache-2.0
 python-observabilityclient>=0.0.4 # Apache-2.0
 python-octaviaclient>=1.8.0 # Apache-2.0
-python-dateutil>=2.8.2 # BSD
+python-dateutil>=2.5.3 # BSD
 python-heatclient>=1.17.0 # Apache-2.0
 tzdata>=2022.4 # MIT