diff --git a/package-lock.json b/package-lock.json
index bcf1fcbde013..981d5ccb29ac 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "@webref/idl": "file:packages/idl",
         "css-tree": "3.1.0",
         "mocha": "11.2.2",
-        "reffy": "18.6.3",
+        "reffy": "18.7.0",
         "rimraf": "6.0.1",
         "strudy": "^3.1.1",
         "webidl2": "24.4.1"
@@ -2355,9 +2355,9 @@
       }
     },
     "node_modules/reffy": {
-      "version": "18.6.3",
-      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.6.3.tgz",
-      "integrity": "sha512-OPHjfmFozpFAo6vh06Oe5gpB0Am5KlYiRDu/K46X2YUnniIb2t3l2KGm/luAGreUA8XTqq6OROIKdW4bHWtmuQ==",
+      "version": "18.7.0",
+      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.7.0.tgz",
+      "integrity": "sha512-h0Zx7j0CVkpGPqGExlpn476GpslaTC03O40f/GELuchGyRVHHZ4tnh3a7rfz2GXFLvuSVFCUYcc9emvJz+zdLg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -3350,7 +3350,7 @@
     },
     "packages/css": {
       "name": "@webref/css",
-      "version": "6.21.1",
+      "version": "6.21.2",
       "dev": true,
       "license": "MIT",
       "peerDependencies": {
@@ -3371,7 +3371,7 @@
     },
     "packages/idl": {
       "name": "@webref/idl",
-      "version": "3.63.1",
+      "version": "3.64.1",
       "dev": true,
       "license": "MIT",
       "peerDependencies": {
@@ -5044,9 +5044,9 @@
       "dev": true
     },
     "reffy": {
-      "version": "18.6.3",
-      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.6.3.tgz",
-      "integrity": "sha512-OPHjfmFozpFAo6vh06Oe5gpB0Am5KlYiRDu/K46X2YUnniIb2t3l2KGm/luAGreUA8XTqq6OROIKdW4bHWtmuQ==",
+      "version": "18.7.0",
+      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.7.0.tgz",
+      "integrity": "sha512-h0Zx7j0CVkpGPqGExlpn476GpslaTC03O40f/GELuchGyRVHHZ4tnh3a7rfz2GXFLvuSVFCUYcc9emvJz+zdLg==",
       "dev": true,
       "requires": {
         "ajv": "8.17.1",
diff --git a/package.json b/package.json
index db81f0674cc1..8aa7a79d5d8c 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "@webref/idl": "file:packages/idl",
     "css-tree": "3.1.0",
     "mocha": "11.2.2",
-    "reffy": "18.6.3",
+    "reffy": "18.7.0",
     "rimraf": "6.0.1",
     "strudy": "^3.1.1",
     "webidl2": "24.4.1"