diff --git a/demo/package-lock.json b/demo/package-lock.json
index 4d82cd65..073ef056 100644
--- a/demo/package-lock.json
+++ b/demo/package-lock.json
@@ -2192,6 +2192,27 @@
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@@ -2952,6 +2981,17 @@
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@@ -3427,6 +3467,21 @@
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+          "integrity": "sha512-IRZSRuzJiynemAXPYtPe5BoI/RESNYR7TYm50MC5Mqbd3Jmw5y790sErYw3V6SryFJD64b74qQQs9wn5Bg/k3g==",
+          "dev": true
+        }
+      }
+    },
     "signal-exit": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz",
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 @@
     "@types/jasminewd2": "^2.0.8",
     "@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",