diff --git a/prototype/package-lock.json b/prototype/package-lock.json
index 68d812f2..e7096753 100644
--- a/prototype/package-lock.json
+++ b/prototype/package-lock.json
@@ -20,7 +20,7 @@
         "dotenv": "^10.0.0",
         "drag-on-drop": "^3.6.1",
         "express": "^4.17.1",
-        "express-session": "^1.13.0",
+        "express-session": "^1.18.2",
         "fancy-log": "^1.3.3",
         "govuk_frontend_toolkit": "^7.5.0",
         "govuk_template_jinja": "^0.24.1",
@@ -4677,15 +4677,16 @@
       }
     },
     "node_modules/express-session": {
-      "version": "1.18.0",
-      "resolved": "https://registry.npmjs.org/express-session/-/express-session-1.18.0.tgz",
-      "integrity": "sha512-m93QLWr0ju+rOwApSsyso838LQwgfs44QtOP/WBiwtAgPIo/SAh1a5c6nn2BR6mFNZehTpqKDESzP+fRHVbxwQ==",
+      "version": "1.18.2",
+      "resolved": "https://registry.npmjs.org/express-session/-/express-session-1.18.2.tgz",
+      "integrity": "sha512-SZjssGQC7TzTs9rpPDuUrR23GNZ9+2+IkA/+IJWmvQilTr5OSliEHGF+D9scbIpdC6yGtTI0/VhaHoVes2AN/A==",
+      "license": "MIT",
       "dependencies": {
-        "cookie": "0.6.0",
+        "cookie": "0.7.2",
         "cookie-signature": "1.0.7",
         "debug": "2.6.9",
         "depd": "~2.0.0",
-        "on-headers": "~1.0.2",
+        "on-headers": "~1.1.0",
         "parseurl": "~1.3.3",
         "safe-buffer": "5.2.1",
         "uid-safe": "~2.1.5"
@@ -4695,9 +4696,10 @@
       }
     },
     "node_modules/express-session/node_modules/cookie": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.6.0.tgz",
-      "integrity": "sha512-U71cyTamuh1CRNCfpGY6to28lxvNwPG4Guz/EVjgf3Jmzv0vlDp1atT9eS5dDjMYHucpHbWns6Lwf3BKz6svdw==",
+      "version": "0.7.2",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.7.2.tgz",
+      "integrity": "sha512-yki5XnKuf750l50uGTllt6kKILY4nQ1eNIQatoXEByZ5dWgnKqbnqmTrBE5B4N7lrMJKQ2ytWMiTO2o0v6Ew/w==",
+      "license": "MIT",
       "engines": {
         "node": ">= 0.6"
       }
@@ -9593,9 +9595,10 @@
       }
     },
     "node_modules/on-headers": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/on-headers/-/on-headers-1.0.2.tgz",
-      "integrity": "sha512-pZAE+FJLoyITytdqK0U5s+FIpjN0JP3OzFi/u8Rx+EV5/W+JTWGXG8xFzevE7AjBfDqHv/8vL8qQsIhHnqRkrA==",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/on-headers/-/on-headers-1.1.0.tgz",
+      "integrity": "sha512-737ZY3yNnXy37FHkQxPzt4UZ2UWPWiCZWLvFZ4fu5cueciegX0zGPnrlY6bwRg4FdQOe9YU8MkmJwGhoMybl8A==",
+      "license": "MIT",
       "engines": {
         "node": ">= 0.8"
       }
diff --git a/prototype/package.json b/prototype/package.json
index 92f52e05..dc1b987e 100644
--- a/prototype/package.json
+++ b/prototype/package.json
@@ -25,7 +25,7 @@
     "dotenv": "^10.0.0",
     "drag-on-drop": "^3.6.1",
     "express": "^4.17.1",
-    "express-session": "^1.13.0",
+    "express-session": "^1.18.2",
     "fancy-log": "^1.3.3",
     "govuk_frontend_toolkit": "^7.5.0",
     "govuk_template_jinja": "^0.24.1",