diff --git a/constant/mime/mime.go b/constant/mime/mime.go
new file mode 100644
index 000000000..431457be8
--- /dev/null
+++ b/constant/mime/mime.go
@@ -0,0 +1,16 @@
+package mime
+
+import (
+	"mime"
+)
+
+var consensusMimes = map[string]string{
+	// rfc4329: text/javascript is obsolete, so we need to overwrite mime's builtin
+	".js": "application/javascript; charset=utf-8",
+}
+
+func init() {
+	for ext, typ := range consensusMimes {
+		mime.AddExtensionType(ext, typ)
+	}
+}
diff --git a/hub/route/server.go b/hub/route/server.go
index e01696bed..c38ca7e10 100644
--- a/hub/route/server.go
+++ b/hub/route/server.go
@@ -9,6 +9,7 @@ import (
 	"time"
 
 	C "github.com/Dreamacro/clash/constant"
+	_ "github.com/Dreamacro/clash/constant/mime"
 	"github.com/Dreamacro/clash/log"
 	"github.com/Dreamacro/clash/tunnel/statistic"