diff --git a/frankenphp/Caddyfile b/frankenphp/Caddyfile
index 3056acd..cfd0ad9 100644
--- a/frankenphp/Caddyfile
+++ b/frankenphp/Caddyfile
@@ -31,7 +31,9 @@
 
 	mercure {
 		# Transport to use (default to Bolt)
-		transport_url {$MERCURE_TRANSPORT_URL:bolt:///data/mercure.db}
+		transport bolt {
+			url {$MERCURE_TRANSPORT_URL:bolt:///data/mercure.db}
+		}
 		# Publisher JWT key
 		publisher_jwt {env.MERCURE_PUBLISHER_JWT_KEY} {env.MERCURE_PUBLISHER_JWT_ALG}
 		# Subscriber JWT key