diff --git a/backend/package.json b/backend/package.json
index a24bbbd..96ff20a 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -28,7 +28,7 @@
     "graphql-subscriptions": "^1.1.0",
     "graphql-yoga": "^1.16.2",
     "http": "^0.0.0",
-    "jsonwebtoken": "^8.3.0",
+    "jsonwebtoken": "^9.0.0",
     "moment": "^2.24.0",
     "nodemailer": "^4.7.0",
     "nodemon": "^1.19.1",
diff --git a/backend/yarn.lock b/backend/yarn.lock
index eb0bbf2..1e44664 100644
--- a/backend/yarn.lock
+++ b/backend/yarn.lock
@@ -4370,6 +4370,16 @@ jsonwebtoken@^8.1.0, jsonwebtoken@^8.3.0:
     ms "^2.1.1"
     semver "^5.6.0"
 
+jsonwebtoken@^9.0.0:
+  version "9.0.0"
+  resolved "https://registry.yarnpkg.com/jsonwebtoken/-/jsonwebtoken-9.0.0.tgz#d0faf9ba1cc3a56255fe49c0961a67e520c1926d"
+  integrity sha512-tuGfYXxkQGDPnLJ7SibiQgVgeDgfbPq2k2ICcbgqW8WxWLBAxKQM/ZCu/IT8SOSwmaYl4dpTFCW5xZv7YbbWUw==
+  dependencies:
+    jws "^3.2.2"
+    lodash "^4.17.21"
+    ms "^2.1.1"
+    semver "^7.3.8"
+
 jsprim@^1.2.2:
   version "1.4.1"
   resolved "https://registry.npm.taobao.org/jsprim/download/jsprim-1.4.1.tgz#313e66bc1e5cc06e438bc1b7499c2e5c56acb6a2"
@@ -4649,10 +4659,10 @@ lodash@4.17.5:
   resolved "https://registry.npm.taobao.org/lodash/download/lodash-4.17.5.tgz?cache=0&sync_timestamp=1569522001300&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Flodash%2Fdownload%2Flodash-4.17.5.tgz#99a92d65c0272debe8c96b6057bc8fbfa3bed511"
   integrity sha1-maktZcAnLevoyWtgV7yPv6O+1RE=
 
-lodash@^4.16.4, lodash@^4.17.10, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.2, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.0, lodash@^4.3.0, lodash@^4.8.0:
-  version "4.17.15"
-  resolved "https://registry.npm.taobao.org/lodash/download/lodash-4.17.15.tgz?cache=0&sync_timestamp=1569522001300&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Flodash%2Fdownload%2Flodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
-  integrity sha1-tEf2ZwoEVbv+7dETku/zMOoJdUg=
+lodash@^4.16.4, lodash@^4.17.10, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.2, lodash@^4.17.21, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.0, lodash@^4.3.0, lodash@^4.8.0:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 log-symbols@^2.1.0:
   version "2.2.0"
@@ -4705,6 +4715,13 @@ lru-cache@^5.0.0:
   dependencies:
     yallist "^3.0.2"
 
+lru-cache@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-6.0.0.tgz#6d6fe6570ebd96aaf90fcad1dafa3b2566db3a94"
+  integrity sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==
+  dependencies:
+    yallist "^4.0.0"
+
 make-dir@^1.0.0:
   version "1.3.0"
   resolved "https://registry.npm.taobao.org/make-dir/download/make-dir-1.3.0.tgz?cache=0&sync_timestamp=1581539452454&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fmake-dir%2Fdownload%2Fmake-dir-1.3.0.tgz#79c1033b80515bd6d24ec9933e860ca75ee27f0c"
@@ -6389,6 +6406,13 @@ semver@^6.3.0:
   resolved "https://registry.npm.taobao.org/semver/download/semver-6.3.0.tgz?cache=0&sync_timestamp=1581458265183&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fsemver%2Fdownload%2Fsemver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
   integrity sha1-7gpkyK9ejO6mdoexM3YeG+y9HT0=
 
+semver@^7.3.8:
+  version "7.3.8"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.8.tgz#07a78feafb3f7b32347d725e33de7e2a2df67798"
+  integrity sha512-NB1ctGL5rlHrPJtFDVIVzTyQylMLu9N9VICA6HSFJo8MCGVTMW6gfpicwKmmK/dAjTOrqu5l63JJOpDSrAis3A==
+  dependencies:
+    lru-cache "^6.0.0"
+
 send@0.17.1:
   version "0.17.1"
   resolved "https://registry.npm.taobao.org/send/download/send-0.17.1.tgz#c1d8b059f7900f7466dd4938bdc44e11ddb376c8"
@@ -7395,6 +7419,11 @@ yallist@^3.0.2:
   resolved "https://registry.npm.taobao.org/yallist/download/yallist-3.1.1.tgz?cache=0&sync_timestamp=1569874223546&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fyallist%2Fdownload%2Fyallist-3.1.1.tgz#dbb7daf9bfd8bac9ab45ebf602b8cbad0d5d08fd"
   integrity sha1-27fa+b/YusmrRev2ArjLrQ1dCP0=
 
+yallist@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/yallist/-/yallist-4.0.0.tgz#9bb92790d9c0effec63be73519e11a35019a3a72"
+  integrity sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==
+
 yaml-ast-parser@^0.0.40:
   version "0.0.40"
   resolved "https://registry.npm.taobao.org/yaml-ast-parser/download/yaml-ast-parser-0.0.40.tgz#08536d4e73d322b1c9ce207ab8dd70e04d20ae6e"