diff --git a/commands/build.v b/commands/build.v
index 1f52839..cfa0052 100644
--- a/commands/build.v
+++ b/commands/build.v
@@ -166,7 +166,7 @@ fn build(config config.Config, mut logger log.Log) ! {
 	logger.info('start md to html')
 	for path in mds {
 		if b.is_ignore(path) {
-			logger.info('$path is included in ignore_files, skip build')
+			logger.info('${path} is included in ignore_files, skip build')
 			continue
 		}
 		b.md2html(path)!
diff --git a/commands/serve.v b/commands/serve.v
index 8816348..6c3655f 100644
--- a/commands/serve.v
+++ b/commands/serve.v
@@ -96,7 +96,7 @@ fn watch(path string, config config.Config, mut logger log.Log) {
 			}
 			now := os.file_last_mod_unix(w.path)
 			if now > w.time_stamp {
-				println('modified file: $w.path')
+				println('modified file: ${w.path}')
 				w.time_stamp = now
 
 				build(config, mut logger) or {
@@ -117,7 +117,7 @@ fn serve(mut logger log.Log) ! {
 		port: commands.cport
 	}
 
-	local_base_url := 'http://localhost:$commands.cport/'
+	local_base_url := 'http://localhost:${commands.cport}/'
 	mut config := load_config(default_config)!
 	config.base_url = local_base_url
 	println(local_base_url)
@@ -128,7 +128,7 @@ fn serve(mut logger log.Log) ! {
 		println('Build failed')
 	}
 
-	w := go watch('.', config, mut logger)
+	w := spawn watch('.', config, mut logger)
 	server.listen_and_serve()
 
 	w.wait()
diff --git a/internal/config/config.v b/internal/config/config.v
index a8b0be0..d68349c 100644
--- a/internal/config/config.v
+++ b/internal/config/config.v
@@ -24,8 +24,8 @@ pub mut:
 pub fn load(toml_text string) !Config {
 	doc := toml.parse_text(toml_text)!
 
-	mut config := doc.reflect<Config>()
-	config.build = doc.value('build').reflect<Build>()
+	mut config := doc.reflect[Config]()
+	config.build = doc.value('build').reflect[Build]()
 
 	return config
 }