diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 94ba477..82b8aa3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,3 +11,13 @@ jobs:
           python-version: "3.6.7"
       - run: pip install -r requirements.txt
       - run: python -m unittest
+
+  test-3.11:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: "3.11.0"
+      - run: pip install -r requirements.txt
+      - run: python -m unittest
diff --git a/mkdocs_blogging_plugin/util.py b/mkdocs_blogging_plugin/util.py
index 151187f..6e83372 100644
--- a/mkdocs_blogging_plugin/util.py
+++ b/mkdocs_blogging_plugin/util.py
@@ -38,7 +38,7 @@
 )
 
 from babel.dates import format_date, format_datetime
-import locale
+import locale, sys
 from datetime import datetime
 from functools import lru_cache
 
@@ -142,7 +142,10 @@ def get_localized_date(timestamp: float, day_only: bool, format: str=None, _loca
             return datetime.strftime(time, format)
         else:
             if not _locale:
-                _locale = locale.getdefaultlocale()[0]
+                if sys.version_info[0] < (3, 11):
+                    _locale = locale.getdefaultlocale()[0]
+                else:
+                    _locale = locale.getlocale()[0]
 
             if day_only:
                 return format_date(time.date(), format="short", locale=_locale)