diff --git a/package-lock.json b/package-lock.json
index 55f4b6165..16e5c1ce6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34,7 +34,7 @@
         "express-static-gzip": "^2.1.7",
         "fnv-plus": "^1.3.1",
         "govuk-frontend": "^5.0.0",
-        "happy-dom": "^13.3.5",
+        "happy-dom": "^13.3.8",
         "helmet": "^7.1.0",
         "html-entities": "^2.4.0",
         "jsonwebtoken": "^9.0.2",
@@ -11101,9 +11101,9 @@
       "dev": true
     },
     "node_modules/happy-dom": {
-      "version": "13.3.5",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-13.3.5.tgz",
-      "integrity": "sha512-PBMhFNNBPGVa8oDP7mHv+kTWNtzIPTogS+V05s3ddsluDmTbcU7EaEMxZdYf2ka55MshloE9/opOHEC+YelzVQ==",
+      "version": "13.3.8",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-13.3.8.tgz",
+      "integrity": "sha512-RAbq4oYfJNkVan1m1F3jfA4YEyRY0/ASoNvZsNJbuX85jIypidmsz9jQZD7Tqz0VXA2MhAGfcsh5oshwmwNYSg==",
       "dependencies": {
         "entities": "^4.5.0",
         "webidl-conversions": "^7.0.0",
@@ -28873,9 +28873,9 @@
       "dev": true
     },
     "happy-dom": {
-      "version": "13.3.5",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-13.3.5.tgz",
-      "integrity": "sha512-PBMhFNNBPGVa8oDP7mHv+kTWNtzIPTogS+V05s3ddsluDmTbcU7EaEMxZdYf2ka55MshloE9/opOHEC+YelzVQ==",
+      "version": "13.3.8",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-13.3.8.tgz",
+      "integrity": "sha512-RAbq4oYfJNkVan1m1F3jfA4YEyRY0/ASoNvZsNJbuX85jIypidmsz9jQZD7Tqz0VXA2MhAGfcsh5oshwmwNYSg==",
       "requires": {
         "entities": "^4.5.0",
         "webidl-conversions": "^7.0.0",
diff --git a/package.json b/package.json
index 5c985bbcc..c77210157 100644
--- a/package.json
+++ b/package.json
@@ -126,7 +126,7 @@
     "express-static-gzip": "^2.1.7",
     "fnv-plus": "^1.3.1",
     "govuk-frontend": "^5.0.0",
-    "happy-dom": "^13.3.5",
+    "happy-dom": "^13.3.8",
     "helmet": "^7.1.0",
     "html-entities": "^2.4.0",
     "jsonwebtoken": "^9.0.2",