diff --git a/package-lock.json b/package-lock.json
index 74a21de..3b7ceb5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-draggable-nested-tree",
-  "version": "2.2.17",
+  "version": "2.2.20",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -4747,9 +4747,9 @@
       "dev": true
     },
     "eventsource": {
-      "version": "1.0.7",
-      "resolved": "http://registry.npm.taobao.org/eventsource/download/eventsource-1.0.7.tgz",
-      "integrity": "sha1-j7xyyT/NNAiAkLwKTmT0tc7m2NA=",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-1.1.1.tgz",
+      "integrity": "sha512-qV5ZC0h7jYIAOhArFJgSfdyz6rALJyb270714o7ZtNnw2WSJ+eexhKtE0O8LYPRsHZHf2osHKZBxGPvm3kPkCA==",
       "dev": true,
       "requires": {
         "original": "^1.0.0"