diff --git a/dist/index.js b/dist/index.js
index 378070809..2bdc726cb 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -63543,7 +63543,7 @@ module.exports = {
 
 
 const { parseSetCookie } = __nccwpck_require__(4408)
-const { stringify, getHeadersList } = __nccwpck_require__(3121)
+const { stringify } = __nccwpck_require__(3121)
 const { webidl } = __nccwpck_require__(1744)
 const { Headers } = __nccwpck_require__(554)
 
@@ -63619,14 +63619,13 @@ function getSetCookies (headers) {
 
   webidl.brandCheck(headers, Headers, { strict: false })
 
-  const cookies = getHeadersList(headers).cookies
+  const cookies = headers.getSetCookie()
 
   if (!cookies) {
     return []
   }
 
-  // In older versions of undici, cookies is a list of name:value.
-  return cookies.map((pair) => parseSetCookie(Array.isArray(pair) ? pair[1] : pair))
+  return cookies.map((pair) => parseSetCookie(pair))
 }
 
 /**
@@ -64054,14 +64053,15 @@ module.exports = {
 /***/ }),
 
 /***/ 3121:
-/***/ ((module, __unused_webpack_exports, __nccwpck_require__) => {
+/***/ ((module) => {
 
 "use strict";
 
 
-const assert = __nccwpck_require__(9491)
-const { kHeadersList } = __nccwpck_require__(2785)
-
+/**
+ * @param {string} value
+ * @returns {boolean}
+ */
 function isCTLExcludingHtab (value) {
   if (value.length === 0) {
     return false
@@ -64322,31 +64322,13 @@ function stringify (cookie) {
   return out.join('; ')
 }
 
-let kHeadersListNode
-
-function getHeadersList (headers) {
-  if (headers[kHeadersList]) {
-    return headers[kHeadersList]
-  }
-
-  if (!kHeadersListNode) {
-    kHeadersListNode = Object.getOwnPropertySymbols(headers).find(
-      (symbol) => symbol.description === 'headers list'
-    )
-
-    assert(kHeadersListNode, 'Headers cannot be parsed')
-  }
-
-  const headersList = headers[kHeadersListNode]
-  assert(headersList)
-
-  return headersList
-}
-
 module.exports = {
   isCTLExcludingHtab,
-  stringify,
-  getHeadersList
+  validateCookieName,
+  validateCookiePath,
+  validateCookieValue,
+  toIMFDate,
+  stringify
 }
 
 
@@ -68350,6 +68332,7 @@ const {
   isValidHeaderName,
   isValidHeaderValue
 } = __nccwpck_require__(2538)
+const util = __nccwpck_require__(3837)
 const { webidl } = __nccwpck_require__(1744)
 const assert = __nccwpck_require__(9491)
 
@@ -68903,6 +68886,9 @@ Object.defineProperties(Headers.prototype, {
   [Symbol.toStringTag]: {
     value: 'Headers',
     configurable: true
+  },
+  [util.inspect.custom]: {
+    enumerable: false
   }
 })
 
@@ -78079,6 +78065,20 @@ class Pool extends PoolBase {
       ? { ...options.interceptors }
       : undefined
     this[kFactory] = factory
+
+    this.on('connectionError', (origin, targets, error) => {
+      // If a connection error occurs, we remove the client from the pool,
+      // and emit a connectionError event. They will not be re-used.
+      // Fixes https://github.com/nodejs/undici/issues/3895
+      for (const target of targets) {
+        // Do not use kRemoveClient here, as it will close the client,
+        // but the client cannot be closed in this state.
+        const idx = this[kClients].indexOf(target)
+        if (idx !== -1) {
+          this[kClients].splice(idx, 1)
+        }
+      }
+    })
   }
 
   [kGetDispatcher] () {
diff --git a/package-lock.json b/package-lock.json
index d40d7ea62..68b520975 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1577,9 +1577,9 @@
       }
     },
     "node_modules/cheerio/node_modules/undici": {
-      "version": "6.21.1",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-6.21.1.tgz",
-      "integrity": "sha512-q/1rj5D0/zayJB2FraXdaWxbhWiNKDvu8naDT2dl1yTlvJp4BLtOcp2a5BvgGNQpYYJzau7tf1WgKv3b+7mqpQ==",
+      "version": "6.21.3",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-6.21.3.tgz",
+      "integrity": "sha512-gBLkYIlEnSp8pFbT64yFgGE6UIB9tAkhukC23PmMDCe5Nd+cRqKxSjw5y54MK2AZMgZfJWMaNE4nYUHgi1XEOw==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -4441,9 +4441,9 @@
       }
     },
     "node_modules/undici": {
-      "version": "5.28.5",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-5.28.5.tgz",
-      "integrity": "sha512-zICwjrDrcrUE0pyyJc1I2QzBkLM8FINsgOrt6WjA+BgajVq9Nxu2PbFFXUrAggLfDXlZGZBVZYw7WNV5KiBiBA==",
+      "version": "5.29.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-5.29.0.tgz",
+      "integrity": "sha512-raqeBD6NQK4SkWhQzeYKd1KmIG6dllBOTt55Rmkt4HtI9mwdWtJljnrXjAFUBLTSN67HWrOIZ3EPF4kjUw80Bg==",
       "license": "MIT",
       "dependencies": {
         "@fastify/busboy": "^2.0.0"