diff --git a/package-lock.json b/package-lock.json
index b47bf4580481..483ac1ecd145 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -20,7 +20,7 @@
         "css-tree": "3.1.0",
         "flags": "0.2.2",
         "mocha": "11.0.1",
-        "reffy": "18.2.0",
+        "reffy": "18.2.1",
         "rimraf": "6.0.1",
         "strudy": "^3.1.1",
         "webidl2": "24.4.1"
@@ -2558,9 +2558,9 @@
       }
     },
     "node_modules/reffy": {
-      "version": "18.2.0",
-      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.2.0.tgz",
-      "integrity": "sha512-DIRWCPx0R/ncta2g0lj16f1cnnGdECV9iBfCMti5y3S9l/wo6XuLErQOP+b+YaRnO4oe0fGCExsAXnEu8tMN2w==",
+      "version": "18.2.1",
+      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.2.1.tgz",
+      "integrity": "sha512-t0sJWOJf/mijRdTB3rEPL0nXlR4pWHFezezsGDgqMOLGx1lytdexeulcEEW/sHWsTkBGj9i6ET6QtWRXpypn8Q==",
       "dev": true,
       "dependencies": {
         "ajv": "8.17.1",
@@ -5414,9 +5414,9 @@
       }
     },
     "reffy": {
-      "version": "18.2.0",
-      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.2.0.tgz",
-      "integrity": "sha512-DIRWCPx0R/ncta2g0lj16f1cnnGdECV9iBfCMti5y3S9l/wo6XuLErQOP+b+YaRnO4oe0fGCExsAXnEu8tMN2w==",
+      "version": "18.2.1",
+      "resolved": "https://registry.npmjs.org/reffy/-/reffy-18.2.1.tgz",
+      "integrity": "sha512-t0sJWOJf/mijRdTB3rEPL0nXlR4pWHFezezsGDgqMOLGx1lytdexeulcEEW/sHWsTkBGj9i6ET6QtWRXpypn8Q==",
       "dev": true,
       "requires": {
         "ajv": "8.17.1",
diff --git a/package.json b/package.json
index a5077d934226..e4f7080b738f 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "css-tree": "3.1.0",
     "flags": "0.2.2",
     "mocha": "11.0.1",
-    "reffy": "18.2.0",
+    "reffy": "18.2.1",
     "rimraf": "6.0.1",
     "strudy": "^3.1.1",
     "webidl2": "24.4.1"