diff --git a/src/feather/data.py b/src/feather/data.py
index a6af71f..4117545 100644
--- a/src/feather/data.py
+++ b/src/feather/data.py
@@ -38,7 +38,7 @@ def sanitize_filename(
         return filename[:cutoff] + "…" + insert_before_suffix + suffix
 
 
-def format_datetime(config: Config, timestamp: int) -> str:
+def format_datetime(config: Config, timestamp: float) -> str:
     """Format a timestamp according to the configuration."""
     if timestamp < 0:
         date = datetime(1970, 1, 1, tzinfo=config.timezone) + timedelta(
@@ -103,8 +103,8 @@ class Article(ABC):
     # with default value
     unread: bool = True  # if the article is unread
     title: str = ""  # article title
-    published: int = 0  # article publication time (timestamp)
-    updated: int = 0  # article update time (timestamp)
+    published: float = 0.0  # article publication time (timestamp)
+    updated: float = 0.0  # article update time (timestamp)
     author: str = ""  # article author
     summary: str = ""  # article summary (HTML)
     content: str = ""  # article content (HTML)
@@ -116,7 +116,7 @@ class Article(ABC):
     comments_url: str = ""  # article comments URL
     language: str = ""  # article language
     image_url: str = ""  # article main image
-    last_write: int = 0  # last time this article file was written (timestamp)
+    last_write: float = 0.0  # last time this article file was written (timestamp)
 
     def _hash_id(self):
         return sha256(str(self.id).encode("utf-8")).hexdigest()
@@ -231,7 +231,7 @@ class Article(ABC):
             html_path, config.article_template.render(self._get_template_dict())
         )
         # set accessed date to update time, modified to publication time
-        os.utime(html_path, (max(self.published, self.updated), self.published))
+        os.utime(html_path, (max(int(self.published), int(self.updated)), int(self.published)))
 
     def _delete_html(self, missing_ok=False):
         """Delete the HTML file associated with this article."""