diff --git a/dist/index.js b/dist/index.js
index 72b2fa9..1be5c4b 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -17756,6 +17756,9 @@ function httpRedirectFetch (fetchParams, response) {
     // https://fetch.spec.whatwg.org/#cors-non-wildcard-request-header-name
     request.headersList.delete('authorization')
 
+    // https://fetch.spec.whatwg.org/#authentication-entries
+    request.headersList.delete('proxy-authorization', true)
+
     // "Cookie" and "Host" are forbidden request-headers, which undici doesn't implement.
     request.headersList.delete('cookie')
     request.headersList.delete('host')
diff --git a/package-lock.json b/package-lock.json
index c656508..c56f761 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7205,9 +7205,9 @@
       }
     },
     "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": "5.28.3",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-5.28.3.tgz",
+      "integrity": "sha512-3ItfzbrhDlINjaP0duwnNsKpDQk3acHI3gVJ1z4fmwMK31k5G9OVIAMLSIaP6w4FaGkaAkN6zaQO9LUvZ1t7VA==",
       "dependencies": {
         "@fastify/busboy": "^2.0.0"
       },