diff --git a/bee.json b/bee.json
index f24d27c..4665137 100644
--- a/bee.json
+++ b/bee.json
@@ -1,5 +1,6 @@
 {
 	"go_install": false,
+	"watch_ext": [],
 	"dir_structure":{
 		"controllers": "",
 		"models": "",
diff --git a/run.go b/run.go
index 7b657b5..edc1f33 100644
--- a/run.go
+++ b/run.go
@@ -67,8 +67,8 @@ func init() {
 var appname string
 var conf struct {
 	// Indicates whether execute "go install" before "go build".
-	GoInstall bool `json:"go_install"`
-
+	GoInstall bool     `json:"go_install"`
+	WatchExt  []string `json:"watch_ext"`
 	DirStruct struct {
 		Controllers string
 		Models      string
@@ -141,5 +141,8 @@ func loadConfig() error {
 	if len(conf.DirStruct.Models) == 0 {
 		conf.DirStruct.Models = "models"
 	}
+
+	// Append watch exts.
+	watchExts = append(watchExts, conf.WatchExt...)
 	return nil
 }
diff --git a/watch.go b/watch.go
index f0f23f2..a10b013 100644
--- a/watch.go
+++ b/watch.go
@@ -50,7 +50,7 @@ func NewWatcher(paths []string) {
 				if checkTMPFile(e.Name) {
 					continue
 				}
-				if !checkIsGoFile(e.Name) {
+				if !chekcIfWatchExt(e.Name) {
 					continue
 				}
 
@@ -178,10 +178,14 @@ func checkTMPFile(name string) bool {
 	return false
 }
 
-// checkIsGoFile returns true if the name HasSuffix ".go".
-func checkIsGoFile(name string) bool {
-	if strings.HasSuffix(name, ".go") {
-		return true
+var watchExts = []string{".go"}
+
+// chekcIfWatchExt returns true if the name HasSuffix <watch_ext>.
+func chekcIfWatchExt(name string) bool {
+	for _, s := range watchExts {
+		if strings.HasSuffix(name, s) {
+			return true
+		}
 	}
 	return false
 }