diff --git a/package-lock.json b/package-lock.json
index 1fdc178..c977479 100644
--- a/package-lock.json
+++ b/package-lock.json
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@@ -4097,6 +4107,7 @@
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       "dev": true,
+      "optional": true,
       "requires": {
         "string-width": "^1.0.2 || 2"
       }
diff --git a/package.json b/package.json
index 2988a16..91e7b20 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "jasmine-core": "~2.99.1",
     "jasmine-spec-reporter": "~4.2.1",
     "json-server": "^0.12.1",
-    "jsonwebtoken": "^8.1.1",
+    "jsonwebtoken": "^9.0.0",
     "karma": "~3.1.1",
     "karma-chrome-launcher": "~2.2.0",
     "karma-coverage-istanbul-reporter": "~2.0.1",