diff --git a/oarepo_ui/templates/components/datafields/files/FilesViewer.jinja b/oarepo_ui/templates/components/datafields/files/FilesViewer.jinja
index 075b3702..8cf3954c 100644
--- a/oarepo_ui/templates/components/datafields/files/FilesViewer.jinja
+++ b/oarepo_ui/templates/components/datafields/files/FilesViewer.jinja
@@ -19,7 +19,7 @@
       <td>
         <a href="{{ file.links.content }}">{{ file.key }}</a>
       </td>
-      <td>{{ file.size | filesizeformat }}</td>
+      <td>{{ (file.size or 0) | filesizeformat }}</td>
       <td>
         {% if file.links.preview %}
         <button class="ui button transparent">
diff --git a/setup.cfg b/setup.cfg
index a85a6e7d..66f65571 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = oarepo-ui
-version = 5.2.20
+version = 5.2.21
 description = UI module for invenio 3.5+
 long_description = file: README.md
 long_description_content_type = text/markdown