diff --git a/config/application.php b/config/application.php
index 269b977947..bb06227d15 100644
--- a/config/application.php
+++ b/config/application.php
@@ -89,6 +89,14 @@
 Config::define('SCRIPT_DEBUG', false);
 ini_set('display_errors', 0);
 
+/**
+ * Allow WordPress to detect HTTPS when used behind a reverse proxy or a load balancer
+ * See https://codex.wordpress.org/Function_Reference/is_ssl#Notes
+ */
+if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https') {
+    $_SERVER['HTTPS'] = 'on';
+}
+
 $env_config = __DIR__ . '/environments/' . WP_ENV . '.php';
 
 if (file_exists($env_config)) {