diff --git a/py34/post.py b/py34/post.py
index 93a344a..cd8550a 100644
--- a/py34/post.py
+++ b/py34/post.py
@@ -13,7 +13,7 @@ class Post:
         self.tags:            list[str] = tags.copy()
 
         self._thumbnail_data:   bytes | None = thumbnail
-        self._thumbnail:    ImageFile | None = Image.open(BytesIO(thumbnail)) if thumbnail else None
+        self._thumbnail:    ImageFile | None = None
 
         self._image_format: str       | None = None
         self._image_data:   bytes     | None = None
@@ -21,14 +21,14 @@ class Post:
 
 
     def get_thumbnail(self) -> ImageFile:
-        if self._thumbnail:
+        if self._thumbnail is not None:
             return self._thumbnail
         self._thumbnail = Image.open(BytesIO(self.get_thumbnail_data()))
         return self._thumbnail
 
 
     def get_thumbnail_data(self) -> bytes:
-        if self._thumbnail_data:
+        if self._thumbnail_data is not None:
             return self._thumbnail_data
         self._thumbnail_data = scraper.get(ThumbnailURL(self.image_dir, self.image_id))
         return self._thumbnail_data