diff --git a/google/ads/datamanager_util/format.py b/google/ads/datamanager_util/format.py
index 56a5af9..6250efb 100644
--- a/google/ads/datamanager_util/format.py
+++ b/google/ads/datamanager_util/format.py
@@ -231,7 +231,9 @@ def format_administrative_area(self, administrative_area: str) -> str:
         Raises:
           ValueError: If the provided administrative area is invalid.
         """
-        return self._format_location_string(administrative_area, "Administrative area")
+        return self._format_location_string(
+            administrative_area, "Administrative area"
+        )
 
     def hash_string(self, s: str) -> bytes:
         """Returns bytes containing the hash of the string.
diff --git a/pyproject.toml b/pyproject.toml
index 4512b80..7a8cb09 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ name = "google-ads-datamanager-util"
 version = "0.4.0"
 description = "Utilities for the Data Manager API"
 readme = "./README.rst"
-requires-python = ">=3.9, <3.14"
+requires-python = ">=3.10, <3.14"
 license = {text = "Apache 2.0"}
 authors = [
     {name = "Google LLC", email = "googleapis-packages@google.com"}
@@ -47,7 +47,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "black[jupyter]",
-    "nox >= 2020.12.31, < 2022.6",
+    "nox >= 2026.7.11",
     # Include the dependencies for samples for convenience, since sample updates
     # are often part of the dev process.
     "google-ads-datamanager-util[samples]",
diff --git a/tests/formatter_test.py b/tests/formatter_test.py
index c6fdd03..25e9f4e 100644
--- a/tests/formatter_test.py
+++ b/tests/formatter_test.py
@@ -436,4 +436,3 @@ def test_format_example_address(self):
             "94045",
             self.formatter.format_postal_code("94045"),
         )
-