diff --git a/core/admin/mailu/__init__.py b/core/admin/mailu/__init__.py
index e4024e47..b49bdd67 100644
--- a/core/admin/mailu/__init__.py
+++ b/core/admin/mailu/__init__.py
@@ -57,6 +57,11 @@ def create_app_from_config(config):
             config        = app.config,
         )
 
+    # Jinja filter
+    @app.template_filter()
+    def format_date(value):
+        return utils.flask_babel.format_date(value) if value else ''
+
     # Import views
     from mailu import ui, internal, sso
     app.register_blueprint(ui.ui, url_prefix=app.config['WEB_ADMIN'])
diff --git a/core/admin/mailu/ui/templates/domain/list.html b/core/admin/mailu/ui/templates/domain/list.html
index 6f6bc467..61c09151 100644
--- a/core/admin/mailu/ui/templates/domain/list.html
+++ b/core/admin/mailu/ui/templates/domain/list.html
@@ -46,8 +46,8 @@
     <td>{{ domain.users | count }} / {{ '∞' if domain.max_users == -1 else domain.max_users }}</td>
     <td>{{ domain.aliases | count }} / {{ '∞' if domain.max_aliases == -1 else domain.max_aliases }}</td>
     <td>{{ domain.comment or '' }}</td>
-    <td>{{ domain.created_at }}</td>
-    <td>{{ domain.updated_at or '' }}</td>
+    <td>{{ domain.created_at | format_date }}</td>
+    <td>{{ domain.updated_at | format_date }}</td>
   </tr>
   {%- endfor %}
 </tbody>
diff --git a/core/admin/mailu/utils.py b/core/admin/mailu/utils.py
index 8ae028bf..024c487f 100644
--- a/core/admin/mailu/utils.py
+++ b/core/admin/mailu/utils.py
@@ -18,10 +18,9 @@ import secrets
 import time
 
 from multiprocessing import Value
-
 from mailu import limiter
-
 from flask import current_app as app
+
 import flask
 import flask_login
 import flask_migrate
diff --git a/core/admin/requirements-prod.txt b/core/admin/requirements-prod.txt
index 4b629d5d..ccd2b83d 100644
--- a/core/admin/requirements-prod.txt
+++ b/core/admin/requirements-prod.txt
@@ -1,6 +1,6 @@
 alembic==1.7.4
 appdirs==1.4.4
-Babel==2.6.0
+Babel==2.9.1
 bcrypt==3.2.0
 blinker==1.4
 CacheControl==0.12.6
@@ -18,7 +18,7 @@ dnspython==2.1.0
 dominate==2.3.5
 email-validator==1.1.3
 Flask==1.0.2
-Flask-Babel==1.0.0
+Flask-Babel==2.0.0
 Flask-Bootstrap==3.3.7.1
 Flask-DebugToolbar==0.10.1
 Flask-Limiter==1.0.1
@@ -53,7 +53,7 @@ pycparser==2.20
 Pygments==2.10.0
 pyOpenSSL==21.0.0
 pyparsing==2.4.7
-pytz==2019.1
+pytz==2021.3
 PyYAML==6.0
 redis==3.5.3
 requests==2.25.1