diff --git a/package-lock.json b/package-lock.json
index 8888cf5..932ad2f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -56,7 +56,7 @@
         "webpack-cli": "^3.3.11",
         "webpack-dev-server": "^3.11.0",
         "webpack-merge": "^4.2.2",
-        "ws": "^7.3.0"
+        "ws": "^7.4.6"
       }
     },
     "node_modules/@babel/cli": {
@@ -4375,6 +4375,16 @@
       "integrity": "sha1-JuYe0UIvtw3ULm42cp7VHYVf6Nk=",
       "dev": true
     },
+    "node_modules/bufferutil": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npm.taobao.org/bufferutil/download/bufferutil-4.0.3.tgz",
+      "integrity": "sha1-ZnJLdWvtI818KMTTBteZT5lDzGs=",
+      "dev": true,
+      "peer": true,
+      "dependencies": {
+        "node-gyp-build": "^4.2.0"
+      }
+    },
     "node_modules/builder-util": {
       "version": "22.10.5",
       "resolved": "https://registry.nlark.com/builder-util/download/builder-util-22.10.5.tgz",
@@ -10541,6 +10551,18 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/node-gyp-build": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npm.taobao.org/node-gyp-build/download/node-gyp-build-4.2.3.tgz",
+      "integrity": "sha1-zmJ3+FODX3GIKe+0fbIPPk2cRzk=",
+      "dev": true,
+      "peer": true,
+      "bin": {
+        "node-gyp-build": "bin.js",
+        "node-gyp-build-optional": "optional.js",
+        "node-gyp-build-test": "build-test.js"
+      }
+    },
     "node_modules/node-gyp/node_modules/semver": {
       "version": "5.3.0",
       "resolved": "https://registry.npmjs.org/semver/-/semver-5.3.0.tgz",
@@ -15663,6 +15685,16 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/utf-8-validate": {
+      "version": "5.0.5",
+      "resolved": "https://registry.nlark.com/utf-8-validate/download/utf-8-validate-5.0.5.tgz",
+      "integrity": "sha1-3TLC6CxyAC3J8C62e6Z2H0NFbKE=",
+      "dev": true,
+      "peer": true,
+      "dependencies": {
+        "node-gyp-build": "^4.2.0"
+      }
+    },
     "node_modules/utf8-byte-length": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/utf8-byte-length/-/utf8-byte-length-1.0.4.tgz",
@@ -16954,12 +16986,16 @@
       }
     },
     "node_modules/ws": {
-      "version": "7.3.0",
-      "resolved": "https://registry.npm.taobao.org/ws/download/ws-7.3.0.tgz",
-      "integrity": "sha1-Sy9/IZs9Nze8Gi+/FF2CW5TTj/0=",
+      "version": "7.4.6",
+      "resolved": "https://registry.nlark.com/ws/download/ws-7.4.6.tgz",
+      "integrity": "sha1-VlTKjs3u5HwzqaS/bSjivimAN3w=",
       "dev": true,
       "engines": {
         "node": ">=8.3.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": "^5.0.2"
       }
     },
     "node_modules/xdg-basedir": {
@@ -21099,6 +21135,16 @@
       "integrity": "sha1-JuYe0UIvtw3ULm42cp7VHYVf6Nk=",
       "dev": true
     },
+    "bufferutil": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npm.taobao.org/bufferutil/download/bufferutil-4.0.3.tgz",
+      "integrity": "sha1-ZnJLdWvtI818KMTTBteZT5lDzGs=",
+      "dev": true,
+      "peer": true,
+      "requires": {
+        "node-gyp-build": "^4.2.0"
+      }
+    },
     "builder-util": {
       "version": "22.10.5",
       "resolved": "https://registry.nlark.com/builder-util/download/builder-util-22.10.5.tgz",
@@ -26190,6 +26236,13 @@
         }
       }
     },
+    "node-gyp-build": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npm.taobao.org/node-gyp-build/download/node-gyp-build-4.2.3.tgz",
+      "integrity": "sha1-zmJ3+FODX3GIKe+0fbIPPk2cRzk=",
+      "dev": true,
+      "peer": true
+    },
     "node-libs-browser": {
       "version": "2.2.1",
       "resolved": "https://registry.npm.taobao.org/node-libs-browser/download/node-libs-browser-2.2.1.tgz",
@@ -30479,6 +30532,16 @@
       "integrity": "sha1-1QyMrHmhn7wg8pEfVuuXP04QBw8=",
       "dev": true
     },
+    "utf-8-validate": {
+      "version": "5.0.5",
+      "resolved": "https://registry.nlark.com/utf-8-validate/download/utf-8-validate-5.0.5.tgz",
+      "integrity": "sha1-3TLC6CxyAC3J8C62e6Z2H0NFbKE=",
+      "dev": true,
+      "peer": true,
+      "requires": {
+        "node-gyp-build": "^4.2.0"
+      }
+    },
     "utf8-byte-length": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/utf8-byte-length/-/utf8-byte-length-1.0.4.tgz",
@@ -31548,10 +31611,11 @@
       }
     },
     "ws": {
-      "version": "7.3.0",
-      "resolved": "https://registry.npm.taobao.org/ws/download/ws-7.3.0.tgz",
-      "integrity": "sha1-Sy9/IZs9Nze8Gi+/FF2CW5TTj/0=",
-      "dev": true
+      "version": "7.4.6",
+      "resolved": "https://registry.nlark.com/ws/download/ws-7.4.6.tgz",
+      "integrity": "sha1-VlTKjs3u5HwzqaS/bSjivimAN3w=",
+      "dev": true,
+      "requires": {}
     },
     "xdg-basedir": {
       "version": "4.0.0",
diff --git a/package.json b/package.json
index f37d204..642987f 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "webpack-cli": "^3.3.11",
     "webpack-dev-server": "^3.11.0",
     "webpack-merge": "^4.2.2",
-    "ws": "^7.3.0"
+    "ws": "^7.4.6"
   },
   "dependencies": {
     "about-window": "^1.13.2",