diff --git a/layouts/_default/_markup/render-image.html b/layouts/_default/_markup/render-image.html
index 89514cb..f368ff8 100644
--- a/layouts/_default/_markup/render-image.html
+++ b/layouts/_default/_markup/render-image.html
@@ -12,7 +12,7 @@
     {{- end -}}
   {{- end -}}
 {{- end -}}
-{{- $attributes := merge .Attributes (dict "alt" .Text "src" $src "title" (.Title | transform.HTMLEscape)) -}}
+{{- $attributes := merge .Attributes (dict "alt" .Text "src" $src "title" (.Title | transform.HTMLEscape) "loading" "lazy") -}}
 <img
   {{- range $k, $v := $attributes -}}
     {{- if $v -}}