diff --git a/src/app/backend/handler/confighandler.go b/src/app/backend/handler/confighandler.go
index da50cc7469d..2867288f87c 100644
--- a/src/app/backend/handler/confighandler.go
+++ b/src/app/backend/handler/confighandler.go
@@ -61,6 +61,7 @@ func getAppConfigJSON() string {
 
 func ConfigHandler(w http.ResponseWriter, r *http.Request) (int, error) {
 	template, err := template.New(ConfigTemplateName).Parse(ConfigTemplate)
+	w.Header().Set("Content-Type", "application/javascript")
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return http.StatusInternalServerError, err