diff --git a/htmldate/__init__.py b/htmldate/__init__.py
index 2c26dd56..8a1b44cc 100644
--- a/htmldate/__init__.py
+++ b/htmldate/__init__.py
@@ -11,15 +11,17 @@
 
 
 import logging
+
 from datetime import datetime
+from sys import version_info
+
 
-try:
-    datetime.fromisoformat  # type: ignore[attr-defined]
-except AttributeError:  # Python 3.6
+if version_info.minor < 11:
     from backports.datetime_fromisoformat import MonkeyPatch  # type: ignore
 
     MonkeyPatch.patch_fromisoformat()
 
+
 from .core import find_date
 
 logging.getLogger(__name__).addHandler(logging.NullHandler())
diff --git a/setup.py b/setup.py
index 32d95485..b7044d86 100644
--- a/setup.py
+++ b/setup.py
@@ -113,7 +113,7 @@ def get_version(package):
     include_package_data=True,
     python_requires=">=3.6",
     install_requires=[
-        "backports-datetime-fromisoformat; python_version < '3.7'",
+        "backports-datetime-fromisoformat; python_version < '3.11'",
         "charset_normalizer >= 3.0.1; python_version < '3.7'",
         "charset_normalizer >= 3.2.0; python_version >= '3.7'",
         "dateparser >= 1.1.2",  # 1.1.3+ slower