diff --git a/dialogflow-cx/requirements.txt b/dialogflow-cx/requirements.txt
index 123355b47cd..65358245389 100644
--- a/dialogflow-cx/requirements.txt
+++ b/dialogflow-cx/requirements.txt
@@ -1,6 +1,6 @@
 google-cloud-dialogflow-cx==2.0.0
 Flask==3.1.3; python_version >= '3.9'
-python-dateutil==2.9.0.post0
+python-dateutil==3.0.0
 functions-framework==3.9.2
 Werkzeug==3.1.9; python_version >= '3.10'
 termcolor==3.0.0; python_version >= "3.9"
diff --git a/functions/tips-avoid-infinite-retries/requirements.txt b/functions/tips-avoid-infinite-retries/requirements.txt
index 04a2df829c0..9d856f4e207 100644
--- a/functions/tips-avoid-infinite-retries/requirements.txt
+++ b/functions/tips-avoid-infinite-retries/requirements.txt
@@ -1 +1 @@
-python-dateutil==2.9.0.post0
+python-dateutil==3.0.0
diff --git a/functions/v2/tips-avoid-infinite-retries/requirements.txt b/functions/v2/tips-avoid-infinite-retries/requirements.txt
index 0ec1dec6818..3351c4e73de 100644
--- a/functions/v2/tips-avoid-infinite-retries/requirements.txt
+++ b/functions/v2/tips-avoid-infinite-retries/requirements.txt
@@ -1,2 +1,2 @@
 functions-framework==3.9.2
-python-dateutil==2.9.0.post0
+python-dateutil==3.0.0