diff --git a/src/stacosys/db/dao.py b/src/stacosys/db/dao.py
index 5f21ae3..7088d87 100644
--- a/src/stacosys/db/dao.py
+++ b/src/stacosys/db/dao.py
@@ -20,7 +20,7 @@ def notify_comment(comment: Comment):
 def publish_comment(comment: Comment):
     # if published before notification is received
     if comment.notified == None:
-        db()(db().comment.id == comment.id).update(notified=datetime.now())    
+        db()(db().comment.id == comment.id).update(notified=datetime.now())
     db()(db().comment.id == comment.id).update(published=datetime.now())
     db().commit()
 
diff --git a/src/stacosys/run.py b/src/stacosys/run.py
index d311049..260e2a7 100644
--- a/src/stacosys/run.py
+++ b/src/stacosys/run.py
@@ -46,7 +46,7 @@ def configure_and_validate_mailer(config, logger):
         config.get(ConfigParameter.SMTP_LOGIN),
         config.get(ConfigParameter.SMTP_PASSWORD),
     )
-    mailer.configure_destination(config.get(ConfigParameter.SITE_ADMIN_EMAIL))    
+    mailer.configure_destination(config.get(ConfigParameter.SITE_ADMIN_EMAIL))
     try:
         if not mailer.check():
             logger.error("Email configuration not working")
diff --git a/src/stacosys/service/rssfeed.py b/src/stacosys/service/rssfeed.py
index c9bea05..5c94d4e 100644
--- a/src/stacosys/service/rssfeed.py
+++ b/src/stacosys/service/rssfeed.py
@@ -8,7 +8,7 @@ import PyRSS2Gen
 
 from stacosys.db import dao
 
-RFC_822_FORMAT = '%a, %d %b %Y %H:%M:%S +0000'
+RFC_822_FORMAT = "%a, %d %b %Y %H:%M:%S +0000"
 
 
 class Rss:
@@ -42,7 +42,7 @@ class Rss:
                     link=item_link,
                     description=markdownizer.convert(row.content),
                     guid=PyRSS2Gen.Guid(f"{item_link}{row.id}"),
-                    pubDate=self._to_rfc822(row.published)
+                    pubDate=self._to_rfc822(row.published),
                 )
             )
 
@@ -58,5 +58,4 @@ class Rss:
             rss.write_xml(outfile, encoding="utf-8")
 
     def _to_rfc822(self, dt):
-        return dt.replace(tzinfo=timezone.utc) \
-                 .strftime('%a, %d %b %Y %H:%M:%S %z')
+        return dt.replace(tzinfo=timezone.utc).strftime("%a, %d %b %Y %H:%M:%S %z")