diff --git a/backend/package-lock.json b/backend/package-lock.json
index e07f968..dadd63a 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -2469,9 +2469,9 @@
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     },
     "elliptic": {
-      "version": "6.5.2",
-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.2.tgz",
-      "integrity": "sha512-f4x70okzZbIQl/NSRLkI/+tteV/9WqL98zx+SQ69KbXxmVrmjwsNUPn/gYJJ0sHvEak24cZgHIPegRePAtA/xw==",
+      "version": "6.5.3",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.3.tgz",
+      "integrity": "sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==",
       "dev": true,
       "requires": {
         "bn.js": "^4.4.0",
@@ -2484,9 +2484,9 @@
       },
       "dependencies": {
         "bn.js": {
-          "version": "4.11.8",
-          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.8.tgz",
-          "integrity": "sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==",
+          "version": "4.11.9",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.9.tgz",
+          "integrity": "sha512-E6QoYqCKZfgatHTdHzs1RRKP7ip4vvm+EyRUeE2RF0NblwVvb0p6jSVeNTOFxPn26QXN2o6SMfNxKp6kU8zQaw==",
           "dev": true
         }
       }
diff --git a/frontend/simplechat/package-lock.json b/frontend/simplechat/package-lock.json
index 458065e..e759768 100644
--- a/frontend/simplechat/package-lock.json
+++ b/frontend/simplechat/package-lock.json
@@ -5478,9 +5478,9 @@
       "dev": true
     },
     "highlight.js": {
-      "version": "9.18.1",
-      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.18.1.tgz",
-      "integrity": "sha512-OrVKYz70LHsnCgmbXctv/bfuvntIKDz177h0Co37DQ5jamGZLVmoCVMtjMtNZY3X9DrCcKfklHPNeA0uPZhSJg==",
+      "version": "9.18.5",
+      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.18.5.tgz",
+      "integrity": "sha512-a5bFyofd/BHCX52/8i8uJkjr9DYwXIPnM/plwI6W7ezItLGqzt7X2G2nXuYSfsIJdkwwj/g9DG1LkcGJI/dDoA==",
       "dev": true
     },
     "hmac-drbg": {
@@ -10947,7 +10947,7 @@
           "dependencies": {
             "acorn": {
               "version": "3.3.0",
-              "resolved": "http://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz",
+              "resolved": "https://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz",
               "integrity": "sha1-ReN/s56No/JbruP/U2niu18iAXo="
             }
           }
@@ -11851,7 +11851,7 @@
         },
         "browserify-aes": {
           "version": "1.2.0",
-          "resolved": "http://registry.npmjs.org/browserify-aes/-/browserify-aes-1.2.0.tgz",
+          "resolved": "https://registry.npmjs.org/browserify-aes/-/browserify-aes-1.2.0.tgz",
           "integrity": "sha512-+7CHXqGuspUn/Sl5aO7Ea0xWGAtETPXNSAjHo48JfLdPWcMng33Xe4znFvQweqc/uzk5zSOI3H52CYnjCfb5hA==",
           "requires": {
             "buffer-xor": "^1.0.3",
@@ -11885,7 +11885,7 @@
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         "browserify-rsa": {
           "version": "4.0.1",
-          "resolved": "http://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
+          "resolved": "https://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.0.1.tgz",
           "integrity": "sha1-IeCr+vbyApzy+vsTNWenAdQTVSQ=",
           "requires": {
             "bn.js": "^4.1.0",
@@ -11916,7 +11916,7 @@
         },
         "buffer": {
           "version": "4.9.1",
-          "resolved": "http://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz",
+          "resolved": "https://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz",
           "integrity": "sha1-bRu2AbB6TvztlwlBMgkwJ8lbwpg=",
           "requires": {
             "base64-js": "^1.0.2",
@@ -12052,7 +12052,7 @@
         },
         "chalk": {
           "version": "1.1.3",
-          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "requires": {
             "ansi-styles": "^2.2.1",
@@ -12299,7 +12299,7 @@
         },
         "create-hash": {
           "version": "1.2.0",
-          "resolved": "http://registry.npmjs.org/create-hash/-/create-hash-1.2.0.tgz",
+          "resolved": "https://registry.npmjs.org/create-hash/-/create-hash-1.2.0.tgz",
           "integrity": "sha512-z00bCGNHDG8mHAkP7CtT1qVu+bFQUPjYq/4Iv3C3kWjTFV10zIjfSoeqXo9Asws8gwSHDGj/hl2u4OGIjapeCg==",
           "requires": {
             "cipher-base": "^1.0.1",
@@ -12311,7 +12311,7 @@
         },
         "create-hmac": {
           "version": "1.1.7",
-          "resolved": "http://registry.npmjs.org/create-hmac/-/create-hmac-1.1.7.tgz",
+          "resolved": "https://registry.npmjs.org/create-hmac/-/create-hmac-1.1.7.tgz",
           "integrity": "sha512-MJG9liiZ+ogc4TzUwuvbER1JRdgvUFSB5+VR/g5h82fGaIRWMWddtKBHi7/sVhfjQZ6SehlyhvQYrcYkaUIpLg==",
           "requires": {
             "cipher-base": "^1.0.3",
@@ -12518,7 +12518,7 @@
         },
         "diffie-hellman": {
           "version": "5.0.3",
-          "resolved": "http://registry.npmjs.org/diffie-hellman/-/diffie-hellman-5.0.3.tgz",
+          "resolved": "https://registry.npmjs.org/diffie-hellman/-/diffie-hellman-5.0.3.tgz",
           "integrity": "sha512-kqag/Nl+f3GwyK25fhUMYj81BUOrZ9IuJsjIcDE5icNM9FJHAVm3VcUDxdLPoQtTuUylWm6ZIknYJwwaPxsUzg==",
           "requires": {
             "bn.js": "^4.1.0",
@@ -12594,7 +12594,7 @@
           "dependencies": {
             "debug": {
               "version": "2.3.3",
-              "resolved": "http://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
               "integrity": "sha1-QMRT5n5uE8kB3ewxeviYbNqe/4w=",
               "requires": {
                 "ms": "0.7.2"
@@ -12633,7 +12633,7 @@
             },
             "debug": {
               "version": "2.3.3",
-              "resolved": "http://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
               "integrity": "sha1-QMRT5n5uE8kB3ewxeviYbNqe/4w=",
               "requires": {
                 "ms": "0.7.2"
@@ -14084,7 +14084,7 @@
         },
         "http-errors": {
           "version": "1.6.3",
-          "resolved": "http://registry.npmjs.org/http-errors/-/http-errors-1.6.3.tgz",
+          "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.6.3.tgz",
           "integrity": "sha1-i1VoC7S+KDoLW/TqLjhYC+HZMg0=",
           "requires": {
             "depd": "~1.1.2",
@@ -14570,7 +14570,7 @@
           "dependencies": {
             "lodash": {
               "version": "3.10.1",
-              "resolved": "http://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
+              "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
               "integrity": "sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y="
             }
           }
@@ -14606,7 +14606,7 @@
           "dependencies": {
             "minimist": {
               "version": "1.2.0",
-              "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+              "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
               "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
             }
           }
@@ -14815,7 +14815,7 @@
             },
             "readable-stream": {
               "version": "1.0.34",
-              "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
+              "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
               "integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=",
               "requires": {
                 "core-util-is": "~1.0.0",
@@ -14974,7 +14974,7 @@
             },
             "minimist": {
               "version": "1.2.0",
-              "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+              "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
               "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
             },
             "path-exists": {
@@ -15101,7 +15101,7 @@
         },
         "minimist": {
           "version": "0.0.8",
-          "resolved": "http://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
           "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
         },
         "mixin-deep": {
@@ -15125,7 +15125,7 @@
         },
         "mkdirp": {
           "version": "0.5.1",
-          "resolved": "http://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
           "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
           "requires": {
             "minimist": "0.0.8"
@@ -15152,7 +15152,7 @@
           "dependencies": {
             "commander": {
               "version": "2.9.0",
-              "resolved": "http://registry.npmjs.org/commander/-/commander-2.9.0.tgz",
+              "resolved": "https://registry.npmjs.org/commander/-/commander-2.9.0.tgz",
               "integrity": "sha1-nJkJQXbhIkDLItbFFGCYQA/g99Q=",
               "requires": {
                 "graceful-readlink": ">= 1.0.0"
@@ -15439,7 +15439,7 @@
         },
         "onetime": {
           "version": "1.1.0",
-          "resolved": "http://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
           "integrity": "sha1-ofeDj4MUxRbwXs78vEzP4EtO14k="
         },
         "optimist": {
@@ -15544,7 +15544,7 @@
         },
         "parse-asn1": {
           "version": "5.1.1",
-          "resolved": "http://registry.npmjs.org/parse-asn1/-/parse-asn1-5.1.1.tgz",
+          "resolved": "https://registry.npmjs.org/parse-asn1/-/parse-asn1-5.1.1.tgz",
           "integrity": "sha512-KPx7flKXg775zZpnp9SxJlz00gTd4BmJ2yJufSc44gMCRrRQ7NSzAcSJQfifuOLgW6bEi+ftrALtsgALeB2Adw==",
           "requires": {
             "asn1.js": "^4.0.0",
@@ -15767,7 +15767,7 @@
         },
         "public-encrypt": {
           "version": "4.0.2",
-          "resolved": "http://registry.npmjs.org/public-encrypt/-/public-encrypt-4.0.2.tgz",
+          "resolved": "https://registry.npmjs.org/public-encrypt/-/public-encrypt-4.0.2.tgz",
           "integrity": "sha512-4kJ5Esocg8X3h8YgJsKAuoesBgB7mqH3eowiDzMUPKiRDDE7E/BqqZD1hnTByIaAFiwAw246YEltSq7tdrOH0Q==",
           "requires": {
             "bn.js": "^4.1.0",
@@ -15883,7 +15883,7 @@
         },
         "readable-stream": {
           "version": "2.3.6",
-          "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
           "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
           "requires": {
             "core-util-is": "~1.0.0",
@@ -16196,7 +16196,7 @@
         },
         "sha.js": {
           "version": "2.4.11",
-          "resolved": "http://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
+          "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
           "integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==",
           "requires": {
             "inherits": "^2.0.1",
@@ -16374,7 +16374,7 @@
           "dependencies": {
             "debug": {
               "version": "2.3.3",
-              "resolved": "http://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
               "integrity": "sha1-QMRT5n5uE8kB3ewxeviYbNqe/4w=",
               "requires": {
                 "ms": "0.7.2"
@@ -16403,7 +16403,7 @@
           "dependencies": {
             "debug": {
               "version": "2.3.3",
-              "resolved": "http://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
               "integrity": "sha1-QMRT5n5uE8kB3ewxeviYbNqe/4w=",
               "requires": {
                 "ms": "0.7.2"
@@ -16441,7 +16441,7 @@
             },
             "debug": {
               "version": "2.3.3",
-              "resolved": "http://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-2.3.3.tgz",
               "integrity": "sha1-QMRT5n5uE8kB3ewxeviYbNqe/4w=",
               "requires": {
                 "ms": "0.7.2"
@@ -16467,7 +16467,7 @@
           "dependencies": {
             "debug": {
               "version": "2.2.0",
-              "resolved": "http://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
               "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
               "requires": {
                 "ms": "0.7.1"
@@ -16662,7 +16662,7 @@
         },
         "table": {
           "version": "3.8.3",
-          "resolved": "http://registry.npmjs.org/table/-/table-3.8.3.tgz",
+          "resolved": "https://registry.npmjs.org/table/-/table-3.8.3.tgz",
           "integrity": "sha1-K7xULw/amGGnVdOUf+/Ys/UThV8=",
           "requires": {
             "ajv": "^4.7.0",
@@ -16719,7 +16719,7 @@
         },
         "through": {
           "version": "2.3.8",
-          "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
+          "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
           "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU="
         },
         "time-stamp": {
@@ -16895,7 +16895,7 @@
             },
             "yargs": {
               "version": "3.10.0",
-              "resolved": "http://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
+              "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
               "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
               "requires": {
                 "camelcase": "^1.0.2",
@@ -17537,7 +17537,7 @@
         },
         "wrap-ansi": {
           "version": "2.1.0",
-          "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
           "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
           "requires": {
             "string-width": "^1.0.1",
diff --git a/frontend/simplechat/yarn.lock b/frontend/simplechat/yarn.lock
index b3de4d8..87f72fc 100644
--- a/frontend/simplechat/yarn.lock
+++ b/frontend/simplechat/yarn.lock
@@ -2479,6 +2479,11 @@ core-js@^3.6.4:
   resolved "https://registry.npm.taobao.org/core-js/download/core-js-3.6.5.tgz?cache=0&sync_timestamp=1586450269267&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fcore-js%2Fdownload%2Fcore-js-3.6.5.tgz#7395dc273af37fb2e50e9bd3d9fe841285231d1a"
   integrity sha1-c5XcJzrzf7LlDpvT2f6EEoUjHRo=
 
+core-js@^3.6.5:
+  version "3.7.0"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.7.0.tgz#b0a761a02488577afbf97179e4681bf49568520f"
+  integrity sha512-NwS7fI5M5B85EwpWuIwJN4i/fbisQUwLwiSNUWeXlkAZ0sbBjLEvLvFLf1uzAUV66PcEPt4xCGCmOZSxVf3xzA==
+
 core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.npm.taobao.org/core-util-is/download/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
@@ -4110,9 +4115,9 @@ hex-color-regex@^1.1.0:
   integrity sha1-TAb8y0YC/iYCs8k9+C1+fb8aio4=
 
 highlight.js@^9.6.0:
-  version "9.18.1"
-  resolved "https://registry.npm.taobao.org/highlight.js/download/highlight.js-9.18.1.tgz#ed21aa001fe6252bb10a3d76d47573c6539fe13c"
-  integrity sha1-7SGqAB/mJSuxCj121HVzxlOf4Tw=
+  version "9.18.5"
+  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-9.18.5.tgz#d18a359867f378c138d6819edfc2a8acd5f29825"
+  integrity sha512-a5bFyofd/BHCX52/8i8uJkjr9DYwXIPnM/plwI6W7ezItLGqzt7X2G2nXuYSfsIJdkwwj/g9DG1LkcGJI/dDoA==
 
 hmac-drbg@^1.0.0:
   version "1.0.1"
@@ -8074,6 +8079,11 @@ uuid@^3.3.2, uuid@^3.4.0:
   resolved "https://registry.npm.taobao.org/uuid/download/uuid-3.4.0.tgz?cache=0&sync_timestamp=1588192989289&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fuuid%2Fdownload%2Fuuid-3.4.0.tgz#b23e4358afa8a202fe7a100af1f5f883f02007ee"
   integrity sha1-sj5DWK+oogL+ehAK8fX4g/AgB+4=
 
+uuid@^8.0.0:
+  version "8.3.1"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-8.3.1.tgz#2ba2e6ca000da60fce5a196954ab241131e05a31"
+  integrity sha512-FOmRr+FmWEIG8uhZv6C2bTgEVXsHk08kE7mPlrBbEe+c3r9pjceVPgupIfNIhc4yx55H69OXANrUaSuu9eInKg==
+
 v8-compile-cache@^2.0.3:
   version "2.1.0"
   resolved "https://registry.npm.taobao.org/v8-compile-cache/download/v8-compile-cache-2.1.0.tgz#e14de37b31a6d194f5690d67efc4e7f6fc6ab30e"
@@ -8111,6 +8121,11 @@ vm-browserify@^1.0.1:
   resolved "https://registry.npm.taobao.org/vm-browserify/download/vm-browserify-1.1.2.tgz#78641c488b8e6ca91a75f511e7a3b32a86e5dda0"
   integrity sha1-eGQcSIuObKkadfUR56OzKobl3aA=
 
+vue-chat-scroll@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/vue-chat-scroll/-/vue-chat-scroll-1.4.0.tgz#013555d51086438829279c48614e8b8ba9301a68"
+  integrity sha512-taHcwJJadZwJR4C4t/fv+R9ZXXSrwrpQKP17La/ep5q7IyH5i3BvscgSpXwu7s8TPP9T9n5n3JDnO+vRsZ/mBQ==
+
 vue-eslint-parser@^7.0.0:
   version "7.0.0"
   resolved "https://registry.npm.taobao.org/vue-eslint-parser/download/vue-eslint-parser-7.0.0.tgz#a4ed2669f87179dedd06afdd8736acbb3a3864d6"
@@ -8139,6 +8154,11 @@ vue-loader@^15.9.1:
     vue-hot-reload-api "^2.3.0"
     vue-style-loader "^4.1.0"
 
+vue-native-websocket@^2.0.14:
+  version "2.0.14"
+  resolved "https://registry.yarnpkg.com/vue-native-websocket/-/vue-native-websocket-2.0.14.tgz#fddb56f9f93d2ecc861486ee3c8f29506ea2a168"
+  integrity sha512-oK8+xG1gmqRs4JngHGwEc4zWoRjsdMB20Sz8pemkh4lW2Vr2676/cDRtd30aGnO2xF7Oxf003wS5JO0kypUsCw==
+
 vue-router@^3.1.6:
   version "3.1.6"
   resolved "https://registry.npm.taobao.org/vue-router/download/vue-router-3.1.6.tgz?cache=0&sync_timestamp=1588663962110&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fvue-router%2Fdownload%2Fvue-router-3.1.6.tgz#45f5a3a3843e31702c061dd829393554e4328f89"