diff --git a/package-lock.json b/package-lock.json
index 74a21de..f13bab9 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": {
@@ -5696,12 +5696,6 @@
             "brace-expansion": "^1.1.7"
           }
         },
-        "minimist": {
-          "version": "0.0.8",
-          "bundled": true,
-          "dev": true,
-          "optional": true
-        },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
@@ -5721,15 +5715,6 @@
             "minipass": "^2.2.1"
           }
         },
-        "mkdirp": {
-          "version": "0.5.1",
-          "bundled": true,
-          "dev": true,
-          "optional": true,
-          "requires": {
-            "minimist": "0.0.8"
-          }
-        },
         "ms": {
           "version": "2.0.0",
           "bundled": true,
@@ -5868,14 +5853,6 @@
             "ini": "~1.3.0",
             "minimist": "^1.2.0",
             "strip-json-comments": "~2.0.1"
-          },
-          "dependencies": {
-            "minimist": {
-              "version": "1.2.0",
-              "bundled": true,
-              "dev": true,
-              "optional": true
-            }
           }
         },
         "readable-stream": {
@@ -7450,19 +7427,19 @@
       }
     },
     "loader-fs-cache": {
-      "version": "1.0.1",
-      "resolved": "http://registry.npm.taobao.org/loader-fs-cache/download/loader-fs-cache-1.0.1.tgz",
-      "integrity": "sha1-VuC/CL2XCLJqdltoUJhAyN7J/bw=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/loader-fs-cache/-/loader-fs-cache-1.0.3.tgz",
+      "integrity": "sha512-ldcgZpjNJj71n+2Mf6yetz+c9bM4xpKtNds4LbqXzU/PTdeAX0g3ytnU1AJMEcTk2Lex4Smpe3Q/eCTsvUBxbA==",
       "dev": true,
       "requires": {
         "find-cache-dir": "^0.1.1",
-        "mkdirp": "0.5.1"
+        "mkdirp": "^0.5.1"
       },
       "dependencies": {
         "find-cache-dir": {
           "version": "0.1.1",
-          "resolved": "http://registry.npm.taobao.org/find-cache-dir/download/find-cache-dir-0.1.1.tgz",
-          "integrity": "sha1-yN765XyKUqinhPnjHFfHQumToLk=",
+          "resolved": "https://registry.npmjs.org/find-cache-dir/-/find-cache-dir-0.1.1.tgz",
+          "integrity": "sha512-Z9XSBoNE7xQiV6MSgPuCfyMokH2K7JdpRkOYE1+mu3d4BFJtx3GW+f6Bo4q8IX6rlf5MYbLBKW0pjl2cWdkm2A==",
           "dev": true,
           "requires": {
             "commondir": "^1.0.1",
@@ -7472,8 +7449,8 @@
         },
         "find-up": {
           "version": "1.1.2",
-          "resolved": "http://registry.npm.taobao.org/find-up/download/find-up-1.1.2.tgz",
-          "integrity": "sha1-ay6YIrGizgpgq2TWEOzK1TyyTQ8=",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-1.1.2.tgz",
+          "integrity": "sha512-jvElSjyuo4EMQGoTwo1uJU5pQMwTW5lS1x05zzfJuTIyLR3zwO27LYrxNg+dlvKpGOuGy/MzBdXh80g0ve5+HA==",
           "dev": true,
           "requires": {
             "path-exists": "^2.0.0",
@@ -7482,8 +7459,8 @@
         },
         "path-exists": {
           "version": "2.1.0",
-          "resolved": "http://registry.npm.taobao.org/path-exists/download/path-exists-2.1.0.tgz",
-          "integrity": "sha1-D+tsZPD8UY2adU3V77YscCJ2H0s=",
+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-2.1.0.tgz",
+          "integrity": "sha512-yTltuKuhtNeFJKa1PiRzfLAU5182q1y4Eb4XCJ3PBqyzEDkAZRzBrKKBct682ls9reBVHf9udYLN5Nd+K1B9BQ==",
           "dev": true,
           "requires": {
             "pinkie-promise": "^2.0.0"
@@ -7491,8 +7468,8 @@
         },
         "pkg-dir": {
           "version": "1.0.0",
-          "resolved": "http://registry.npm.taobao.org/pkg-dir/download/pkg-dir-1.0.0.tgz",
-          "integrity": "sha1-ektQio1bstYp1EcFb/TpyTFM89Q=",
+          "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-1.0.0.tgz",
+          "integrity": "sha512-c6pv3OE78mcZ92ckebVDqg0aWSoKhOTbwCV6qbCWMk546mAL9pZln0+QsN/yQ7fkucd4+yJPLrCBXNt8Ruk+Eg==",
           "dev": true,
           "requires": {
             "find-up": "^1.0.0"
@@ -7906,9 +7883,9 @@
       }
     },
     "minimist": {
-      "version": "1.2.0",
-      "resolved": "http://registry.npm.taobao.org/minimist/download/minimist-1.2.0.tgz",
-      "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+      "version": "1.2.8",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.8.tgz",
+      "integrity": "sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA==",
       "dev": true
     },
     "minimost": {
@@ -7973,20 +7950,12 @@
       }
     },
     "mkdirp": {
-      "version": "0.5.1",
-      "resolved": "http://registry.npm.taobao.org/mkdirp/download/mkdirp-0.5.1.tgz",
-      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "version": "0.5.6",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.6.tgz",
+      "integrity": "sha512-FP+p8RB8OWpF3YZBCrP5gtADmtXApB5AMLn+vdyA+PyxCjrCs00mjyUozssO33cwDeT3wNGdLxJ5M//YqtHAJw==",
       "dev": true,
       "requires": {
-        "minimist": "0.0.8"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "0.0.8",
-          "resolved": "http://registry.npm.taobao.org/minimist/download/minimist-0.0.8.tgz",
-          "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
-          "dev": true
-        }
+        "minimist": "^1.2.6"
       }
     },
     "move-concurrently": {