diff --git a/package-lock.json b/package-lock.json
index 2014713f..e0a37f27 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "reffy",
-  "version": "14.3.0",
+  "version": "14.4.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "reffy",
-      "version": "14.3.0",
+      "version": "14.4.0",
       "license": "MIT",
       "dependencies": {
         "ajv": "8.12.0",
@@ -27,7 +27,7 @@
         "respec": "34.2.2",
         "respec-hljs": "2.1.1",
         "rollup": "4.6.1",
-        "undici": "^5.22.1"
+        "undici": "^6.0.0"
       },
       "engines": {
         "node": ">=18"
@@ -2822,15 +2822,15 @@
       }
     },
     "node_modules/undici": {
-      "version": "5.28.2",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-5.28.2.tgz",
-      "integrity": "sha512-wh1pHJHnUeQV5Xa8/kyQhO7WFa8M34l026L5P/+2TYiakvGy5Rdc8jWZVyG7ieht/0WgJLEd3kcU5gKx+6GC8w==",
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-6.0.0.tgz",
+      "integrity": "sha512-m3nzx/3ji00Y6wY9hAJTBOBdtcMj0SyxpHKd5kaxghTftjB3icbYaPXGeogxIVcm6FVvnAM9aB6wz9L8Sntt8w==",
       "dev": true,
       "dependencies": {
         "@fastify/busboy": "^2.0.0"
       },
       "engines": {
-        "node": ">=14.0"
+        "node": ">=18.0"
       }
     },
     "node_modules/undici-types": {
@@ -5039,9 +5039,9 @@
       }
     },
     "undici": {
-      "version": "5.28.2",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-5.28.2.tgz",
-      "integrity": "sha512-wh1pHJHnUeQV5Xa8/kyQhO7WFa8M34l026L5P/+2TYiakvGy5Rdc8jWZVyG7ieht/0WgJLEd3kcU5gKx+6GC8w==",
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-6.0.0.tgz",
+      "integrity": "sha512-m3nzx/3ji00Y6wY9hAJTBOBdtcMj0SyxpHKd5kaxghTftjB3icbYaPXGeogxIVcm6FVvnAM9aB6wz9L8Sntt8w==",
       "dev": true,
       "requires": {
         "@fastify/busboy": "^2.0.0"
diff --git a/package.json b/package.json
index 22ee94e6..9235e5bd 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "respec": "34.2.2",
     "respec-hljs": "2.1.1",
     "rollup": "4.6.1",
-    "undici": "^5.22.1"
+    "undici": "^6.0.0"
   },
   "overrides": {
     "puppeteer": "$puppeteer"