diff --git a/package-lock.json b/package-lock.json
index f82622d2dc8b..26512f63a20e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "@webref/idl": "file:packages/idl",
         "css-tree": "3.1.0",
         "mocha": "11.1.0",
-        "reffy": "18.4.2",
+        "reffy": "18.4.5",
         "rimraf": "6.0.1",
         "strudy": "^3.1.1",
         "webidl2": "24.4.1"
@@ -2481,9 +2481,9 @@
       }
     },
     "node_modules/reffy": {
-      "version": "18.4.2",
-      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.4.2.tgz",
-      "integrity": "sha512-Z6+Ul7L9JmOZc9L108Ta9rR6Olw7XNYCr6jwTPzdufB8wVtZHoa/P5s+Chs+MXMPUWjLiMrVoeHWelHxl7RJWQ==",
+      "version": "18.4.5",
+      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.4.5.tgz",
+      "integrity": "sha512-t5zIM1/YNatULQ7fvR+usgkVT8WTaXzUP90JT/ZuDwlJ+nSDUETK7nMDzJSffBSWpBWEQG6W1bu33c9p88AsrQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -2493,7 +2493,7 @@
         "fetch-filecache-for-crawling": "5.1.1",
         "puppeteer": "24.4.0",
         "semver": "^7.3.5",
-        "web-specs": "3.43.0",
+        "web-specs": "3.45.0",
         "webidl2": "24.4.1"
       },
       "bin": {
@@ -3188,9 +3188,9 @@
       }
     },
     "node_modules/web-specs": {
-      "version": "3.43.0",
-      "resolved": "https://registry.npmjs.org/web-specs/-/web-specs-3.43.0.tgz",
-      "integrity": "sha512-ASCG9ntQpdcpUQ9VqUqjmRJTjKxTW/gdHmT8vn/+vxcK34wsCgWEIoANLrugAEBK39VezVkTYEnFLgAknYVm7Q==",
+      "version": "3.45.0",
+      "resolved": "https://registry.npmjs.org/web-specs/-/web-specs-3.45.0.tgz",
+      "integrity": "sha512-dZ2ulGlj1Q7tnQgUWsXt2CxqDYj5aErL5SPgCBIEPBlfIzGpfAPSDxriYmRyy8fyMN+art/rvSpkWk5UZIkCHQ==",
       "dev": true,
       "license": "CC0-1.0"
     },
@@ -3471,7 +3471,7 @@
     },
     "packages/css": {
       "name": "@webref/css",
-      "version": "6.20.5",
+      "version": "6.20.6",
       "dev": true,
       "license": "MIT",
       "peerDependencies": {
@@ -3492,7 +3492,7 @@
     },
     "packages/idl": {
       "name": "@webref/idl",
-      "version": "3.61.2",
+      "version": "3.61.3",
       "dev": true,
       "license": "MIT",
       "peerDependencies": {
@@ -5256,9 +5256,9 @@
       }
     },
     "reffy": {
-      "version": "18.4.2",
-      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.4.2.tgz",
-      "integrity": "sha512-Z6+Ul7L9JmOZc9L108Ta9rR6Olw7XNYCr6jwTPzdufB8wVtZHoa/P5s+Chs+MXMPUWjLiMrVoeHWelHxl7RJWQ==",
+      "version": "18.4.5",
+      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.4.5.tgz",
+      "integrity": "sha512-t5zIM1/YNatULQ7fvR+usgkVT8WTaXzUP90JT/ZuDwlJ+nSDUETK7nMDzJSffBSWpBWEQG6W1bu33c9p88AsrQ==",
       "dev": true,
       "requires": {
         "ajv": "8.17.1",
@@ -5267,7 +5267,7 @@
         "fetch-filecache-for-crawling": "5.1.1",
         "puppeteer": "24.4.0",
         "semver": "^7.3.5",
-        "web-specs": "3.43.0",
+        "web-specs": "3.45.0",
         "webidl2": "24.4.1"
       },
       "dependencies": {
@@ -5753,9 +5753,9 @@
       }
     },
     "web-specs": {
-      "version": "3.43.0",
-      "resolved": "https://registry.npmjs.org/web-specs/-/web-specs-3.43.0.tgz",
-      "integrity": "sha512-ASCG9ntQpdcpUQ9VqUqjmRJTjKxTW/gdHmT8vn/+vxcK34wsCgWEIoANLrugAEBK39VezVkTYEnFLgAknYVm7Q==",
+      "version": "3.45.0",
+      "resolved": "https://registry.npmjs.org/web-specs/-/web-specs-3.45.0.tgz",
+      "integrity": "sha512-dZ2ulGlj1Q7tnQgUWsXt2CxqDYj5aErL5SPgCBIEPBlfIzGpfAPSDxriYmRyy8fyMN+art/rvSpkWk5UZIkCHQ==",
       "dev": true
     },
     "webidl-conversions": {
diff --git a/package.json b/package.json
index fa3a508ffe07..b8d6bd2f69ec 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "@webref/idl": "file:packages/idl",
     "css-tree": "3.1.0",
     "mocha": "11.1.0",
-    "reffy": "18.4.2",
+    "reffy": "18.4.5",
     "rimraf": "6.0.1",
     "strudy": "^3.1.1",
     "webidl2": "24.4.1"