diff --git a/etiquette/jsonify.py b/etiquette/jsonify.py
index ec36447..9046622 100644
--- a/etiquette/jsonify.py
+++ b/etiquette/jsonify.py
@@ -48,7 +48,7 @@ def photo(p, include_albums=True, include_tags=True):
         'bytes': p.bytes,
         'duration_str': p.duration_string,
         'duration': p.duration,
-        'bytes_str': p.bytestring(),
+        'bytes_str': p.bytestring,
         'has_thumbnail': bool(p.thumbnail),
         'created': p.created,
         'filename': p.basename,
diff --git a/etiquette/objects.py b/etiquette/objects.py
index 4adeb22..fc4ff31 100644
--- a/etiquette/objects.py
+++ b/etiquette/objects.py
@@ -635,6 +635,7 @@ class Photo(ObjectBase):
             self.photodb.commit()
         return tag
 
+    @property
     def bytestring(self):
         if self.bytes is not None:
             return bytestring.bytestring(self.bytes)
diff --git a/frontends/etiquette_flask/templates/photo.html b/frontends/etiquette_flask/templates/photo.html
index 4163ec7..cba4e54 100644
--- a/frontends/etiquette_flask/templates/photo.html
+++ b/frontends/etiquette_flask/templates/photo.html
@@ -192,7 +192,7 @@
             <li>Dimensions: {{photo.width}}x{{photo.height}} px</li>
             <li>Aspect ratio: {{photo.ratio}}</li>
         {% endif %}
-        <li>Size: {{photo.bytestring()}}</li>
+        <li>Size: {{photo.bytestring}}</li>
         {% if photo.duration %}
             <li>Duration: {{photo.duration_string}}</li>
             <li>Overall Bitrate: {{photo.bitrate|int}} kbps</li>
diff --git a/frontends/etiquette_flask/templates/photo_card.html b/frontends/etiquette_flask/templates/photo_card.html
index 39581ba..8292fea 100644
--- a/frontends/etiquette_flask/templates/photo_card.html
+++ b/frontends/etiquette_flask/templates/photo_card.html
@@ -20,7 +20,7 @@
 <div class="photo_card photo_card_list" data-id="{{photo.id}}">
     <input type="checkbox" class="photo_card_selector_checkbox" onclick="on_photo_select(event)"/>
     <span class="photo_card_filename"><a target="_blank" href="/photo/{{photo.id}}">{{photo.basename}}</a></span>
-    <a class="photo_card_metadata" target="_blank" href="/file/{{photo.id}}.{{photo.extension}}">{{photo.bytestring()}}</a>
+    <a class="photo_card_metadata" target="_blank" href="/file/{{photo.id}}.{{photo.extension}}">{{photo.bytestring}}</a>
 </div>
 {% else %}
 
@@ -69,7 +69,7 @@
 
     <span class="photo_card_metadata">
     {{- metadata_inner|safe -}}
-    <a target="_blank" href="/file/{{photo.id}}.{{photo.extension}}">{{photo.bytestring()}}</a>
+    <a target="_blank" href="/file/{{photo.id}}.{{photo.extension}}">{{photo.bytestring}}</a>
     </span>
 
     <input type="checkbox" class="photo_card_selector_checkbox" onclick="on_photo_select(event)"/>