diff --git a/config/config.go b/config/config.go
index cb94946..77df2b0 100644
--- a/config/config.go
+++ b/config/config.go
@@ -137,7 +137,9 @@ func LoadConfig(customPath string) *Config {
 
 // applyDefaults fills zero-value fields with sensible defaults.
 func applyDefaults(cfg *Config, defaultPath string) *Config {
-	if cfg.Web.Port == "" {
+	// If the entire web block is empty (old config without "web" key),
+	// fill default port so the app still starts on 8080.
+	if cfg.Web.Port == "" && cfg.Web.Socket == "" {
 		cfg.Web.Port = defaultPort
 	}
 	if cfg.Database.Type == "" {