diff --git a/app/views/libraries/_form.html.erb b/app/views/libraries/_form.html.erb
index b3ed4721..a813e4b7 100644
--- a/app/views/libraries/_form.html.erb
+++ b/app/views/libraries/_form.html.erb
@@ -66,7 +66,7 @@
     //你的lib目录的路径，我这边用JSP做测试的
     path: "/editormd/lib/",
     tex: true,
-    watch:false,
+    watch:true,
     toolbarIcons: function () {
       // Or return editormd.toolbarModes[name]; // full, simple, mini
       // Using "||" set icons align right.