diff --git a/package-lock.json b/package-lock.json
index 8ed6e0b67..e16c9e37c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,7 @@
         "date-fns": "^4.1.0",
         "express": "^4.21.2",
         "express-prom-bundle": "^6.5.0",
-        "express-session": "^1.18.0",
+        "express-session": "^1.18.1",
         "fishery": "^2.2.2",
         "govuk-frontend": "^5.7.1",
         "helmet": "^7.0.0",
@@ -6257,6 +6257,14 @@
       "integrity": "sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg==",
       "dev": true
     },
+    "node_modules/cookie": {
+      "version": "0.7.2",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.7.2.tgz",
+      "integrity": "sha512-yki5XnKuf750l50uGTllt6kKILY4nQ1eNIQatoXEByZ5dWgnKqbnqmTrBE5B4N7lrMJKQ2ytWMiTO2o0v6Ew/w==",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/cookie-session": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/cookie-session/-/cookie-session-2.1.0.tgz",
@@ -8187,11 +8195,11 @@
       }
     },
     "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": "1.18.1",
+      "resolved": "https://registry.npmjs.org/express-session/-/express-session-1.18.1.tgz",
+      "integrity": "sha512-a5mtTqEaZvBCL9A9aqkrtfz+3SMDhOVUnjafjo+s7A9Txkq+SVX2DLvSp1Zrv4uCXa3lMSK3viWnh9Gg07PBUA==",
       "dependencies": {
-        "cookie": "0.6.0",
+        "cookie": "0.7.2",
         "cookie-signature": "1.0.7",
         "debug": "2.6.9",
         "depd": "~2.0.0",
@@ -8204,14 +8212,6 @@
         "node": ">= 0.8.0"
       }
     },
-    "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==",
-      "engines": {
-        "node": ">= 0.6"
-      }
-    },
     "node_modules/express-session/node_modules/cookie-signature": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.7.tgz",
diff --git a/package.json b/package.json
index 7eb98de7a..5d3f83666 100644
--- a/package.json
+++ b/package.json
@@ -151,7 +151,7 @@
     "date-fns": "^4.1.0",
     "express": "^4.21.2",
     "express-prom-bundle": "^6.5.0",
-    "express-session": "^1.18.0",
+    "express-session": "^1.18.1",
     "fishery": "^2.2.2",
     "govuk-frontend": "^5.7.1",
     "helmet": "^7.0.0",