diff --git a/data/zip-download/package-lock.json b/data/zip-download/package-lock.json
index 7881c86..e23895a 100644
--- a/data/zip-download/package-lock.json
+++ b/data/zip-download/package-lock.json
@@ -12,7 +12,7 @@
                 "govuk-frontend": "~6.1.0",
                 "govuk-markdown": "~0.8.0",
                 "hmrc-frontend": "~7.15.0",
-                "marked": "~17.0.6",
+                "marked": "~18.0.5",
                 "moment": "~2.30.1",
                 "nunjucks": "~3.2.4",
                 "tsx": "~4.22.3"
@@ -1215,9 +1215,9 @@
             "license": "MIT"
         },
         "node_modules/marked": {
-            "version": "17.0.6",
-            "resolved": "https://registry.npmjs.org/marked/-/marked-17.0.6.tgz",
-            "integrity": "sha512-gB0gkNafnonOw0obSTEGZTT86IuhILt2Wfx0mWH/1Au83kybTayroZ/V6nS25mN7u8ASy+5fMhgB3XPNrOZdmA==",
+            "version": "18.0.5",
+            "resolved": "https://registry.npmjs.org/marked/-/marked-18.0.5.tgz",
+            "integrity": "sha512-S6GcvALHg6K4ohtu4E7x0a1AqhAjp6cV8KhLSyN9qVapnzJkusVBxZRcIU9AeYsbe6P1hKDusSbEOzGyyuce6w==",
             "license": "MIT",
             "bin": {
                 "marked": "bin/marked.js"
diff --git a/data/zip-download/package.json b/data/zip-download/package.json
index a02711f..277ae7f 100644
--- a/data/zip-download/package.json
+++ b/data/zip-download/package.json
@@ -18,7 +18,7 @@
         "govuk-frontend": "~6.1.0",
         "govuk-markdown": "~0.8.0",
         "hmrc-frontend": "~7.15.0",
-        "marked": "~17.0.6",
+        "marked": "~18.0.5",
         "moment": "~2.30.1",
         "nunjucks": "~3.2.4",
         "tsx": "~4.22.3"