diff --git a/themes/red/layouts/partials/art-years.html b/themes/red/layouts/partials/art-years.html
index de64b27..fe9cf83 100644
--- a/themes/red/layouts/partials/art-years.html
+++ b/themes/red/layouts/partials/art-years.html
@@ -3,7 +3,7 @@
 {{ range $.Param "years" }}
     {{ $year := . }}
     <a href="/art/{{ . }}">
-        {{ $thumbp := printf "/year-thumbs/%s.webp" . }}
+        {{ $thumbp := printf "/year-thumbs/%d.webp" . }}
         {{ with resources.Get $thumbp }}
         <img width="512" height="256" alt="{{ $year }}" class="gallery-img article-img" src="{{ .RelPermalink }}">
         {{ end }}