diff --git a/pyproject.toml b/pyproject.toml
index 449e3e0..50cf5c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ requires-python = ">=3.11"
 dynamic = ["version"]
 
 dependencies = [
-    "python-dateutil >=2.9.0,<3",
+    "python-dateutil >=2.9.0,<4",
     "structlog >=25",
 ]
 
diff --git a/requirements.txt b/requirements.txt
index 3269a78..18c7a98 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-python-dateutil == 2.9.0.post0
+python-dateutil == 3.0.0
 setuptools-git-versioning==3.2.0
 setuptools==84.0.0
 structlog==26.1.0