diff --git a/docker/caddy/Caddyfile b/docker/caddy/Caddyfile
index d5622a8..a7eb466 100644
--- a/docker/caddy/Caddyfile
+++ b/docker/caddy/Caddyfile
@@ -2,7 +2,7 @@
     # Debug
     {$DEBUG}
     # HTTP/3 support
-    servers {
+    servers :443 {
         protocol {
             experimental_http3
         }