diff --git a/docker/wp-config.php b/docker/wp-config.php
index ea3339f7ff9285408d4b82b5da4faebfb52d44a3..35e099c71f69eafe33e164f2df160ec4f721807b 100644
--- a/docker/wp-config.php
+++ b/docker/wp-config.php
@@ -115,6 +115,10 @@ define('SMTP_DEBUG', 0);
  */
 define('COOKIEHASH', '7d12c307721c1cbe9412c639209d72aa');
 
+/* Custom Cache-Control headers for WP-SuperCache.
+ * These are set to match our edge nginx caches.
+define('WPSC_CACHE_CONTROL_HEADER', 'max-age=600');
+
 /**#@+
  * Authentication Unique Keys and Salts.
  *