diff --git a/prosopopee/templates/sections/pictures-group.html b/prosopopee/templates/sections/pictures-group.html
index d3ddb21..02c8f85 100644
--- a/prosopopee/templates/sections/pictures-group.html
+++ b/prosopopee/templates/sections/pictures-group.html
@@ -5,7 +5,7 @@
                 {{ helpers.copy_image(image) }}
                 <div class="picture">
                     <a href="{{ image }}">
-                        <img src="{{ helpers.generate_thumbnail(image, "x400") }}">
+                        <img src="{{ helpers.generate_thumbnail(image, "x600") }}">
                     </a>
                 </div>
             {% if not loop.last %}