diff --git a/package-lock.json b/package-lock.json
index d91c0999e..febc84dc7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -46,7 +46,7 @@
         "joi": "^17.13.3",
         "liquidjs": "^10.21.1",
         "lodash": "^4.17.21",
-        "marked": "^15.0.7",
+        "marked": "^16.4.0",
         "nunjucks": "^3.2.3",
         "outdent": "^0.8.0",
         "pino": "^9.7.0",
@@ -2291,6 +2291,18 @@
         "joi": "^17.0.0"
       }
     },
+    "node_modules/@defra/forms-model/node_modules/marked": {
+      "version": "15.0.12",
+      "resolved": "https://registry.npmjs.org/marked/-/marked-15.0.12.tgz",
+      "integrity": "sha512-8dD6FusOQSrpv9Z1rdNMdlSgQOIP880DHqnohobOmYLElGEqAL/JvxvuxZO16r4HtjTlfPRDC1hbvxC9dPN2nA==",
+      "license": "MIT",
+      "bin": {
+        "marked": "bin/marked.js"
+      },
+      "engines": {
+        "node": ">= 18"
+      }
+    },
     "node_modules/@defra/forms-model/node_modules/nanoid": {
       "version": "5.1.5",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-5.1.5.tgz",
@@ -12512,15 +12524,15 @@
       }
     },
     "node_modules/marked": {
-      "version": "15.0.12",
-      "resolved": "https://registry.npmjs.org/marked/-/marked-15.0.12.tgz",
-      "integrity": "sha512-8dD6FusOQSrpv9Z1rdNMdlSgQOIP880DHqnohobOmYLElGEqAL/JvxvuxZO16r4HtjTlfPRDC1hbvxC9dPN2nA==",
+      "version": "16.4.0",
+      "resolved": "https://registry.npmjs.org/marked/-/marked-16.4.0.tgz",
+      "integrity": "sha512-CTPAcRBq57cn3R8n3hwc2REddc28hjR7RzDXQ+lXLmMJYqn20BaI2cGw6QjgZGIgVfp2Wdfw4aMzgNteQ6qJgQ==",
       "license": "MIT",
       "bin": {
         "marked": "bin/marked.js"
       },
       "engines": {
-        "node": ">= 18"
+        "node": ">= 20"
       }
     },
     "node_modules/mathml-tag-names": {
diff --git a/package.json b/package.json
index a6487bfaf..3daa83db0 100644
--- a/package.json
+++ b/package.json
@@ -106,7 +106,7 @@
     "joi": "^17.13.3",
     "liquidjs": "^10.21.1",
     "lodash": "^4.17.21",
-    "marked": "^15.0.7",
+    "marked": "^16.4.0",
     "nunjucks": "^3.2.3",
     "outdent": "^0.8.0",
     "pino": "^9.7.0",