diff --git a/src/_includes/asummersend/hero.njk b/src/_includes/asummersend/hero.njk
index b3688258..86f8d266 100644
--- a/src/_includes/asummersend/hero.njk
+++ b/src/_includes/asummersend/hero.njk
@@ -1,7 +1,10 @@
 {% extends "global/hero.njk" %}
 
 {% block heroImg %}
-    <img src="/assets/asummersend/images/asummersend_header.png" alt="Banner of A Summer's End — Hong Kong 1986 Shrine">
+    <picture>
+        <source srcset="/assets/asummersend/images/asummersend-header-320.png" media="(orientation: landscape)" />
+        <img src="/assets/asummersend/images/asummersend-header.png" alt="Banner of A Summer's End — Hong Kong 1986 Shrine" />
+    </picture>
 {% endblock %}
 
 {% block eventScript %}
diff --git a/src/assets/asummersend/images/asummersend-header-320.png b/src/assets/asummersend/images/asummersend-header-320.png
new file mode 100644
index 00000000..fe164c51
Binary files /dev/null and b/src/assets/asummersend/images/asummersend-header-320.png differ
diff --git a/src/assets/asummersend/images/asummersend_header.png b/src/assets/asummersend/images/asummersend-header.png
similarity index 100%
rename from src/assets/asummersend/images/asummersend_header.png
rename to src/assets/asummersend/images/asummersend-header.png