diff --git a/package-lock.json b/package-lock.json
index 2774eb347..959fba850 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -36,16 +36,16 @@
         "chokidar": "^3.6.0",
         "convict": "^6.2.5",
         "dotenv": "^17.4.2",
-        "govuk-frontend": "^5.13.0",
+        "govuk-frontend": "^6.6.0",
         "hapi-pino": "^13.0.0",
         "hapi-pulse": "^3.0.1",
         "http-status-codes": "^2.3.0",
-        "humanize-duration": "^3.34.0",
+        "humanize-duration": "^3.35.1",
         "i18next": "^26.0.5",
         "ioredis": "^5.11.1",
         "joi": "^18.2.9",
         "jose": "^6.2.12",
-        "liquidjs": "^10.24.0",
+        "liquidjs": "^10.30.1",
         "lodash": "^4.17.21",
         "lru-cache": "^11.5.1",
         "marked": "^17.0.1",
@@ -64,7 +64,7 @@
         "@testing-library/dom": "^10.4.1",
         "@testing-library/jest-dom": "^6.9.1",
         "@types/convict": "^6.1.6",
-        "@types/govuk-frontend": "^5.11.0",
+        "@types/govuk-frontend": "^6.6.0",
         "@types/hapi__crumb": "^7.3.7",
         "@types/jest": "^30.0.0",
         "@types/jsdom": "^28.0.3",
@@ -2590,6 +2590,15 @@
         "url": "https://opencollective.com/turf"
       }
     },
+    "node_modules/@defra/forms-engine-plugin/node_modules/govuk-frontend": {
+      "version": "5.14.0",
+      "resolved": "https://registry.npmjs.org/govuk-frontend/-/govuk-frontend-5.14.0.tgz",
+      "integrity": "sha512-MgfaXswIM6KpXS2T5gltEnzgVLgfM3UoE9+rYkhBiR0suaJ8Let31VZXQZqz9QhiPDbv28fW1nRjIyLujfZIBA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 4.2.0"
+      }
+    },
     "node_modules/@defra/forms-engine-plugin/node_modules/marked": {
       "version": "15.0.12",
       "resolved": "https://registry.npmjs.org/marked/-/marked-15.0.12.tgz",
@@ -2722,6 +2731,15 @@
         }
       }
     },
+    "node_modules/@defra/interactive-map/node_modules/govuk-frontend": {
+      "version": "5.14.0",
+      "resolved": "https://registry.npmjs.org/govuk-frontend/-/govuk-frontend-5.14.0.tgz",
+      "integrity": "sha512-MgfaXswIM6KpXS2T5gltEnzgVLgfM3UoE9+rYkhBiR0suaJ8Let31VZXQZqz9QhiPDbv28fW1nRjIyLujfZIBA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 4.2.0"
+      }
+    },
     "node_modules/@defra/interactive-map/node_modules/preact": {
       "version": "10.29.8",
       "resolved": "https://registry.npmjs.org/preact/-/preact-10.29.8.tgz",
@@ -3486,6 +3504,15 @@
         "nunjucks": "^3.2.4"
       }
     },
+    "node_modules/@govuk-one-login/service-header/node_modules/govuk-frontend": {
+      "version": "5.14.0",
+      "resolved": "https://registry.npmjs.org/govuk-frontend/-/govuk-frontend-5.14.0.tgz",
+      "integrity": "sha512-MgfaXswIM6KpXS2T5gltEnzgVLgfM3UoE9+rYkhBiR0suaJ8Let31VZXQZqz9QhiPDbv28fW1nRjIyLujfZIBA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 4.2.0"
+      }
+    },
     "node_modules/@hapi/accept": {
       "version": "6.0.3",
       "resolved": "https://registry.npmjs.org/@hapi/accept/-/accept-6.0.3.tgz",
@@ -7295,9 +7322,9 @@
       }
     },
     "node_modules/@types/govuk-frontend": {
-      "version": "5.11.0",
-      "resolved": "https://registry.npmjs.org/@types/govuk-frontend/-/govuk-frontend-5.11.0.tgz",
-      "integrity": "sha512-XUl4XsWqUQPPf5hNlljWjtMfXiCms/ZwVfSA1w94fDW/426gXZnCjRNYR3POUEfCzjY088odIDsra7i+fD57TA==",
+      "version": "6.6.0",
+      "resolved": "https://registry.npmjs.org/@types/govuk-frontend/-/govuk-frontend-6.6.0.tgz",
+      "integrity": "sha512-DKy96yzh6X+FBSA+srzkY9zfLQXgjyxbegmg7hReKDWZYfKL/60gauqfLCd5dRQIYZJOMxadVvD3FCFuTzRu8w==",
       "dev": true,
       "license": "MIT"
     },
@@ -12319,9 +12346,9 @@
       }
     },
     "node_modules/govuk-frontend": {
-      "version": "5.13.0",
-      "resolved": "https://registry.npmjs.org/govuk-frontend/-/govuk-frontend-5.13.0.tgz",
-      "integrity": "sha512-6N3pHelWN7wftdM6e4YEzZAfattapa1gnd+Al6d5PUbfTr9D+T2dnphpNpjX75CTEhihlQqlL0RDQ3WIfZ3PSg==",
+      "version": "6.6.0",
+      "resolved": "https://registry.npmjs.org/govuk-frontend/-/govuk-frontend-6.6.0.tgz",
+      "integrity": "sha512-xctkWrQvLnvQt7fyjQ3MGX9S0wz0x0RQuLxCeoXF+s8EjGICG81/DYQGKN5qgO+0KVT12UAaRwUsGY6fulRcRg==",
       "license": "MIT",
       "engines": {
         "node": ">= 4.2.0"
@@ -12636,9 +12663,9 @@
       }
     },
     "node_modules/humanize-duration": {
-      "version": "3.34.0",
-      "resolved": "https://registry.npmjs.org/humanize-duration/-/humanize-duration-3.34.0.tgz",
-      "integrity": "sha512-NDxhYxiiRzsST6xULIHuYWRvsCtviJXRdjarhyWyh78S4Ou+MWhM2k4HQ+y7iegdrzreXe11isd0au1N2PB/pQ==",
+      "version": "3.35.1",
+      "resolved": "https://registry.npmjs.org/humanize-duration/-/humanize-duration-3.35.1.tgz",
+      "integrity": "sha512-O4HQEzneiiAiPmFzvQKKK+Gbz3vFO9Obq6lnWsbGyUbJ54m7mDN+/lHpzilFxDd8pmrMzuHLw4dsoWnLCEq7dQ==",
       "license": "Unlicense",
       "funding": {
         "url": "https://github.com/sponsors/EvanHahn"
@@ -14969,9 +14996,9 @@
       }
     },
     "node_modules/liquidjs": {
-      "version": "10.29.0",
-      "resolved": "https://registry.npmjs.org/liquidjs/-/liquidjs-10.29.0.tgz",
-      "integrity": "sha512-pCVOhs6FLAR8su3ItJ07diN26t6W5dHQRnmTMy8HPyTFuv1+oSCVJIGp5pGjfQyOZfh50KswvKtMTp6p4JEIdw==",
+      "version": "10.30.1",
+      "resolved": "https://registry.npmjs.org/liquidjs/-/liquidjs-10.30.1.tgz",
+      "integrity": "sha512-P1Iz14WUHZdfbOYwHOIhtl/iAWIOYk1ks5l9rPZlDM6vZo+6BLeYIuWHAPkIz+U8Mm8HKZKITIrjX7DQJO2fqA==",
       "license": "MIT",
       "dependencies": {
         "commander": "^10.0.0"
diff --git a/package.json b/package.json
index 24f082117..096629d5e 100644
--- a/package.json
+++ b/package.json
@@ -71,16 +71,16 @@
     "chokidar": "^3.6.0",
     "convict": "^6.2.5",
     "dotenv": "^17.4.2",
-    "govuk-frontend": "^5.13.0",
+    "govuk-frontend": "^6.6.0",
     "hapi-pino": "^13.0.0",
     "hapi-pulse": "^3.0.1",
     "http-status-codes": "^2.3.0",
-    "humanize-duration": "^3.34.0",
+    "humanize-duration": "^3.35.1",
     "i18next": "^26.0.5",
     "ioredis": "^5.11.1",
     "joi": "^18.2.9",
     "jose": "^6.2.12",
-    "liquidjs": "^10.24.0",
+    "liquidjs": "^10.30.1",
     "lodash": "^4.17.21",
     "lru-cache": "^11.5.1",
     "marked": "^17.0.1",
@@ -99,7 +99,7 @@
     "@testing-library/dom": "^10.4.1",
     "@testing-library/jest-dom": "^6.9.1",
     "@types/convict": "^6.1.6",
-    "@types/govuk-frontend": "^5.11.0",
+    "@types/govuk-frontend": "^6.6.0",
     "@types/hapi__crumb": "^7.3.7",
     "@types/jest": "^30.0.0",
     "@types/jsdom": "^28.0.3",