diff --git a/package-lock.json b/package-lock.json
index e1f2bd2..11ce7e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2004,7 +2004,8 @@
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       "resolved": "http://registry.npm.taobao.org/async-limiter/download/async-limiter-1.0.0.tgz",
-      "integrity": "sha1-ePrtjD0HSrgfIrTphdeehzj3IPg="
+      "integrity": "sha1-ePrtjD0HSrgfIrTphdeehzj3IPg=",
+      "dev": true
     },
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@@ -2418,9 +2419,9 @@
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-      "resolved": "https://registry.npmjs.org/base64id/-/base64id-1.0.0.tgz",
-      "integrity": "sha1-R2iMuZu2gE8OBtPnY7HDLlfY5rY="
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/base64id/-/base64id-2.0.0.tgz",
+      "integrity": "sha512-lGe34o6EHj9y3Kts9R4ZYs/Gr+6N7MCaMlIFA3F1R2O5/m7K06AxfSeO5530PEERE6/WyEg3lsuyw4GHlPZHog=="
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@@ -2438,14 +2439,6 @@
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-      "resolved": "https://registry.npmjs.org/better-assert/-/better-assert-1.0.2.tgz",
-      "integrity": "sha1-QIZrnhueC1W0gYlDEeaPr/rrxSI=",
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       "resolved": "http://registry.npm.taobao.org/bfj-node4/download/bfj-node4-5.3.1.tgz",
@@ -2470,9 +2463,9 @@
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-      "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.4.tgz",
-      "integrity": "sha1-vPEwUspURj8w+fx+lbmkdjCpSSE="
+      "version": "0.0.5",
+      "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.5.tgz",
+      "integrity": "sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig=="
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@@ -2794,11 +2787,6 @@
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-      "resolved": "https://registry.npmjs.org/callsite/-/callsite-1.0.0.tgz",
-      "integrity": "sha1-KAOY5dZkvXQDi28JBRU+borxvCA="
-    },
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       "resolved": "http://registry.npm.taobao.org/callsites/download/callsites-0.2.0.tgz",
@@ -3674,7 +3662,8 @@
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       "resolved": "http://registry.npm.taobao.org/cookie/download/cookie-0.3.1.tgz",
-      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
+      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=",
+      "dev": true
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@@ -4691,70 +4680,90 @@
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-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.2.0.tgz",
-      "integrity": "sha512-mRbgmAtQ4GAlKwuPnnAvXXwdPhEx+jkc0OBCLrXuD/CRvwNK3AxRSnqK4FSqmAMRRHryVJP8TopOvmEaA64fKw==",
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.5.0.tgz",
+      "integrity": "sha512-21HlvPUKaitDGE4GXNtQ7PLP0Sz4aWLddMPw2VTyFz1FVZqu/kZsJUO8WNpKuE/OCL7nkfRaOui2ZCJloGznGA==",
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-        "base64id": "1.0.0",
-        "cookie": "0.3.1",
-        "debug": "3.1.0",
-        "engine.io-parser": "2.1.2",
-        "ws": "3.3.3"
+        "accepts": "~1.3.4",
+        "base64id": "2.0.0",
+        "cookie": "~0.4.1",
+        "debug": "~4.1.0",
+        "engine.io-parser": "~2.2.0",
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-          "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
-          "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
+        "cookie": {
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+          "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.1.tgz",
+          "integrity": "sha512-ZwrFkGJxUR3EIoXtO+yVE69Eb7KlixbaeAWfBQB9vVsNn/o+Yw69gBWSSDK825hQNdN+wF8zELf3dFNl/kxkUA=="
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+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
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-            "safe-buffer": "5.1.2",
-            "ultron": "1.1.1"
+            "ms": "^2.1.1"
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+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
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+          "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.2.tgz",
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-      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.2.1.tgz",
-      "integrity": "sha512-y5AbkytWeM4jQr7m/koQLc5AxpRKC1hEVUb/s1FUAWEJq5AzJJ4NLvzuKPuxtDi5Mq755WuDvZ6Iv2rXj4PTzw==",
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.5.0.tgz",
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-        "debug": "3.1.0",
-        "engine.io-parser": "2.1.2",
+        "debug": "~3.1.0",
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         "has-cors": "1.1.0",
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-        "parseqs": "0.0.5",
-        "parseuri": "0.0.5",
-        "ws": "3.3.3",
-        "xmlhttprequest-ssl": "1.5.5",
+        "parseqs": "0.0.6",
+        "parseuri": "0.0.6",
+        "ws": "~7.4.2",
+        "xmlhttprequest-ssl": "~1.5.4",
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-          "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
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-            "ultron": "1.1.1"
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-      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.1.2.tgz",
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+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.2.1.tgz",
+      "integrity": "sha512-x+dN/fBH8Ro8TFwJ+rkB2AmuVw9Yu2mockR/p3W8f8YtExwFgDvBDi0GWyb4ZLkpahtDGZgtr3zLovanJghPqg==",
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-        "base64-arraybuffer": "0.1.5",
-        "blob": "0.0.4",
-        "has-binary2": "1.0.3"
+        "arraybuffer.slice": "~0.0.7",
+        "base64-arraybuffer": "0.1.4",
+        "blob": "0.0.5",
+        "has-binary2": "~1.0.2"
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+          "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.4.tgz",
+          "integrity": "sha1-mBjHngWbE1X5fgQooBfIOOkLqBI="
+        }
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@@ -6150,7 +6159,8 @@
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           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -6171,12 +6181,14 @@
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           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -6191,17 +6203,20 @@
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           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -6318,7 +6333,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -6330,6 +6346,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -6344,6 +6361,7 @@
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           "dev": true,
+          "optional": true,
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@@ -6351,12 +6369,14 @@
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           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "2.2.4",
           "bundled": true,
           "dev": true,
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@@ -6375,6 +6395,7 @@
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@@ -6455,7 +6476,8 @@
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-          "dev": true
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@@ -6467,6 +6489,7 @@
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           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -6552,7 +6575,8 @@
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-          "dev": true
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@@ -6588,6 +6612,7 @@
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           "bundled": true,
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@@ -6607,6 +6632,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -6650,12 +6676,14 @@
         "wrappy": {
           "version": "1.0.2",
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-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
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@@ -9343,11 +9371,6 @@
       "resolved": "http://registry.npm.taobao.org/object-assign/download/object-assign-4.1.1.tgz",
       "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM="
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-      "integrity": "sha1-8MaapQ78lbhmwYb0AKM3acsvEpE="
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@@ -9715,20 +9738,14 @@
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-      "integrity": "sha1-1SCKNzjkZ2bikbouoXNoSSGouJ0=",
-      "requires": {
-        "better-assert": "1.0.2"
-      }
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/parseqs/-/parseqs-0.0.6.tgz",
+      "integrity": "sha512-jeAGzMDbfSHHA091hr0r31eYfTig+29g3GKKE/PPbEQ65X0lmMwlEoqmhzu0iztID5uJpZsFlUPDP8ThPL7M8w=="
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-      "resolved": "https://registry.npmjs.org/parseuri/-/parseuri-0.0.5.tgz",
-      "integrity": "sha1-gCBKUNTbt3m/3G6+J3jZDkvOMgo=",
-      "requires": {
-        "better-assert": "1.0.2"
-      }
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/parseuri/-/parseuri-0.0.6.tgz",
+      "integrity": "sha512-AUjen8sAkGgao7UyCX6Ahv0gIK2fABKmYjvP4xmy5JaKvcbTRueIqIPHLAfq30xJddqSE033IOMUSOMCcK3Sow=="
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@@ -11893,7 +11910,7 @@
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-          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
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@@ -12370,58 +12387,105 @@
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-      "integrity": "sha512-rORqq9c+7W0DAK3cleWNSyfv/qKXV99hV4tZe+gGLfBECw3XEhBy7x85F3wypA9688LKjtwO9pX9L33/xQI8yA==",
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/socket.io/-/socket.io-2.4.0.tgz",
+      "integrity": "sha512-9UPJ1UTvKayuQfVv2IQ3k7tCQC/fboDyIK62i99dAQIyHKaBsNdTpwHLgKJ6guRWxRtC9H+138UwpaGuQO9uWQ==",
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-        "socket.io-adapter": "1.1.1",
-        "socket.io-client": "2.1.1",
-        "socket.io-parser": "3.2.0"
+        "debug": "~4.1.0",
+        "engine.io": "~3.5.0",
+        "has-binary2": "~1.0.2",
+        "socket.io-adapter": "~1.1.0",
+        "socket.io-client": "2.4.0",
+        "socket.io-parser": "~3.4.0"
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+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
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+          "requires": {
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+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
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-      "integrity": "sha1-KoBeihTWNyEk3ZFZrUUC+MsH8Gs="
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/socket.io-adapter/-/socket.io-adapter-1.1.2.tgz",
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+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/socket.io-client/-/socket.io-client-2.4.0.tgz",
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-        "has-cors": "1.1.0",
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-        "socket.io-parser": "3.2.0",
+        "parseqs": "0.0.6",
+        "parseuri": "0.0.6",
+        "socket.io-parser": "~3.3.0",
         "to-array": "0.1.4"
+      },
+      "dependencies": {
+        "component-emitter": {
+          "version": "1.3.0",
+          "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
+          "integrity": "sha512-Rd3se6QB+sO1TwqZjscQrurpEPIfO0/yYnSin6Q/rD3mOutHvUrCAhJub3r90uNb+SESBuE0QYoB90YdfatsRg=="
+        },
+        "isarray": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/isarray/-/isarray-2.0.1.tgz",
+          "integrity": "sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4="
+        },
+        "socket.io-parser": {
+          "version": "3.3.2",
+          "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.3.2.tgz",
+          "integrity": "sha512-FJvDBuOALxdCI9qwRrO/Rfp9yfndRtc1jSgVgV8FDraihmSP/MLGD5PEuJrNfjALvcQ+vMDM/33AWOYP/JSjDg==",
+          "requires": {
+            "component-emitter": "~1.3.0",
+            "debug": "~3.1.0",
+            "isarray": "2.0.1"
+          }
+        }
       }
     },
     "socket.io-parser": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.2.0.tgz",
-      "integrity": "sha512-FYiBx7rc/KORMJlgsXysflWx/RIvtqZbyGLlHZvjfmPTPeuD/I8MaW7cfFrj5tRltICJdgwflhfZ3NVVbVLFQA==",
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.4.1.tgz",
+      "integrity": "sha512-11hMgzL+WCLWf1uFtHSNvliI++tcRUWdoeYuwIl+Axvwy9z2gQM+7nJyN3STj1tLj5JyIUH8/gpDGxzAlDdi0A==",
       "requires": {
         "component-emitter": "1.2.1",
-        "debug": "3.1.0",
+        "debug": "~4.1.0",
         "isarray": "2.0.1"
       },
       "dependencies": {
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
         "isarray": {
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/isarray/-/isarray-2.0.1.tgz",
           "integrity": "sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4="
+        },
+        "ms": {
+          "version": "2.1.3",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
+          "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="
         }
       }
     },
@@ -13348,11 +13412,6 @@
         }
       }
     },
-    "ultron": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.1.1.tgz",
-      "integrity": "sha512-UIEXBNeYmKptWH6z8ZnqTeS8fV74zG0/eRU9VGkpzz+LIJNs8W/zM/L+7ctCkRrgbNnnR0xxw4bKOr0cW0N0Og=="
-    },
     "unicode-canonical-property-names-ecmascript": {
       "version": "1.0.4",
       "resolved": "http://registry.npm.taobao.org/unicode-canonical-property-names-ecmascript/download/unicode-canonical-property-names-ecmascript-1.0.4.tgz",
diff --git a/package.json b/package.json
index 5d695ff..0801247 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "koa2-cors": "^2.0.6",
     "koa2-history-api-fallback": "0.0.5",
     "melongrid.css": "^1.0.1",
-    "socket.io": "^2.1.1",
+    "socket.io": "^2.4.0",
     "vue": "^2.5.16",
     "vue-router": "^3.0.1"
   },