diff --git a/demo/package-lock.json b/demo/package-lock.json
index 4d82cd65..f4ae3b1a 100644
--- a/demo/package-lock.json
+++ b/demo/package-lock.json
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         "parseurl": "~1.3.3",
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+            "inherits": "2.0.4",
+            "setprototypeof": "1.2.0",
+            "statuses": "2.0.1",
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+          "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.4.1.tgz",
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+          "resolved": "https://registry.npmjs.org/send/-/send-0.18.0.tgz",
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+            "depd": "2.0.0",
+            "destroy": "1.2.0",
+            "encodeurl": "~1.0.2",
+            "escape-html": "~1.0.3",
+            "etag": "~1.8.1",
+            "fresh": "0.5.2",
+            "http-errors": "2.0.0",
+            "mime": "1.6.0",
+            "ms": "2.1.3",
+            "on-finished": "2.4.1",
+            "range-parser": "~1.2.1",
+            "statuses": "2.0.1"
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+        "setprototypeof": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
+          "integrity": "sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw==",
+          "dev": true
+        },
+        "statuses": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
+          "integrity": "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ==",
+          "dev": true
+        },
+        "toidentifier": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
+          "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
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+        }
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@@ -8706,6 +9142,28 @@
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       "dev": true
     },
+    "set-function-length": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/set-function-length/-/set-function-length-1.2.2.tgz",
+      "integrity": "sha512-pgRc4hJ4/sNjWCSS9AmnS40x3bNMDTknHgL5UaMBTMyJnU90EgWh1Rz+MC9eFu4BuN/UwZjKQuY/1v3rM7HMfg==",
+      "dev": true,
+      "requires": {
+        "define-data-property": "^1.1.4",
+        "es-errors": "^1.3.0",
+        "function-bind": "^1.1.2",
+        "get-intrinsic": "^1.2.4",
+        "gopd": "^1.0.1",
+        "has-property-descriptors": "^1.0.2"
+      },
+      "dependencies": {
+        "function-bind": {
+          "version": "1.1.2",
+          "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.2.tgz",
+          "integrity": "sha512-7XHNxH7qX9xG5mIwxkhumTox/MIRNcOgDrxWsMt2pAr23WHp6MrRlN7FBSFpCpr+oVO0F744iUgR82nJMfG2SA==",
+          "dev": true
+        }
+      }
+    },
     "set-immediate-shim": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/set-immediate-shim/-/set-immediate-shim-1.0.1.tgz",
@@ -8741,12 +9199,6 @@
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-      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.1.tgz",
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@@ -8791,6 +9243,26 @@
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       "dev": true
     },
+    "side-channel": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.0.6.tgz",
+      "integrity": "sha512-fDW/EZ6Q9RiO8eFG8Hj+7u/oW+XrPTIChwCOM2+th2A6OblDtYYIpve9m+KvI9Z4C9qSEXlaGR6bTEYHReuglA==",
+      "dev": true,
+      "requires": {
+        "call-bind": "^1.0.7",
+        "es-errors": "^1.3.0",
+        "get-intrinsic": "^1.2.4",
+        "object-inspect": "^1.13.1"
+      },
+      "dependencies": {
+        "object-inspect": {
+          "version": "1.13.2",
+          "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.2.tgz",
+          "integrity": "sha512-IRZSRuzJiynemAXPYtPe5BoI/RESNYR7TYm50MC5Mqbd3Jmw5y790sErYw3V6SryFJD64b74qQQs9wn5Bg/k3g==",
+          "dev": true
+        }
+      }
+    },
     "signal-exit": {
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       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz",
@@ -9760,12 +10232,6 @@
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-      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.0.tgz",
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@@ -10070,8 +10536,7 @@
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-      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=",
-      "dev": true
+      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
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diff --git a/demo/package.json b/demo/package.json
index c25bac40..c5d56a0e 100644
--- a/demo/package.json
+++ b/demo/package.json
@@ -72,7 +72,7 @@
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     "@types/node": "^10.17.26",
     "codelyzer": "^5.2.2",
-    "express": "^4.17.1",
+    "express": "^4.20.0",
     "jasmine-core": "~3.3.0",
     "jasmine-spec-reporter": "~4.2.1",
     "karma": "^3.1.4",