diff --git a/dist/index.js b/dist/index.js
index e4a0459..324ea50 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -2275,7 +2275,7 @@ class HttpClient {
         if (this._keepAlive && useProxy) {
             agent = this._proxyAgent;
         }
-        if (this._keepAlive && !useProxy) {
+        if (!useProxy) {
             agent = this._agent;
         }
         // if agent is already assigned use that agent.
@@ -2307,16 +2307,12 @@ class HttpClient {
             agent = tunnelAgent(agentOptions);
             this._proxyAgent = agent;
         }
-        // if reusing agent across request and tunneling agent isn't assigned create a new agent
-        if (this._keepAlive && !agent) {
+        // if tunneling agent isn't assigned create a new agent
+        if (!agent) {
             const options = { keepAlive: this._keepAlive, maxSockets };
             agent = usingSsl ? new https.Agent(options) : new http.Agent(options);
             this._agent = agent;
         }
-        // if not using private agent and tunnel agent isn't setup then use global agent
-        if (!agent) {
-            agent = usingSsl ? https.globalAgent : http.globalAgent;
-        }
         if (usingSsl && this._ignoreSslError) {
             // we don't want to set NODE_TLS_REJECT_UNAUTHORIZED=0 since that will affect request for entire process
             // http.RequestOptions doesn't expose a way to modify RequestOptions.agent.options
@@ -9131,6 +9127,132 @@ function onConnectTimeout (socket) {
 module.exports = buildConnector
 
 
+/***/ }),
+
+/***/ 4002:
+/***/ ((module) => {
+
+"use strict";
+
+
+/** @type {Record<string, string | undefined>} */
+const headerNameLowerCasedRecord = {}
+
+// https://developer.mozilla.org/docs/Web/HTTP/Headers
+const wellknownHeaderNames = [
+  'Accept',
+  'Accept-Encoding',
+  'Accept-Language',
+  'Accept-Ranges',
+  'Access-Control-Allow-Credentials',
+  'Access-Control-Allow-Headers',
+  'Access-Control-Allow-Methods',
+  'Access-Control-Allow-Origin',
+  'Access-Control-Expose-Headers',
+  'Access-Control-Max-Age',
+  'Access-Control-Request-Headers',
+  'Access-Control-Request-Method',
+  'Age',
+  'Allow',
+  'Alt-Svc',
+  'Alt-Used',
+  'Authorization',
+  'Cache-Control',
+  'Clear-Site-Data',
+  'Connection',
+  'Content-Disposition',
+  'Content-Encoding',
+  'Content-Language',
+  'Content-Length',
+  'Content-Location',
+  'Content-Range',
+  'Content-Security-Policy',
+  'Content-Security-Policy-Report-Only',
+  'Content-Type',
+  'Cookie',
+  'Cross-Origin-Embedder-Policy',
+  'Cross-Origin-Opener-Policy',
+  'Cross-Origin-Resource-Policy',
+  'Date',
+  'Device-Memory',
+  'Downlink',
+  'ECT',
+  'ETag',
+  'Expect',
+  'Expect-CT',
+  'Expires',
+  'Forwarded',
+  'From',
+  'Host',
+  'If-Match',
+  'If-Modified-Since',
+  'If-None-Match',
+  'If-Range',
+  'If-Unmodified-Since',
+  'Keep-Alive',
+  'Last-Modified',
+  'Link',
+  'Location',
+  'Max-Forwards',
+  'Origin',
+  'Permissions-Policy',
+  'Pragma',
+  'Proxy-Authenticate',
+  'Proxy-Authorization',
+  'RTT',
+  'Range',
+  'Referer',
+  'Referrer-Policy',
+  'Refresh',
+  'Retry-After',
+  'Sec-WebSocket-Accept',
+  'Sec-WebSocket-Extensions',
+  'Sec-WebSocket-Key',
+  'Sec-WebSocket-Protocol',
+  'Sec-WebSocket-Version',
+  'Server',
+  'Server-Timing',
+  'Service-Worker-Allowed',
+  'Service-Worker-Navigation-Preload',
+  'Set-Cookie',
+  'SourceMap',
+  'Strict-Transport-Security',
+  'Supports-Loading-Mode',
+  'TE',
+  'Timing-Allow-Origin',
+  'Trailer',
+  'Transfer-Encoding',
+  'Upgrade',
+  'Upgrade-Insecure-Requests',
+  'User-Agent',
+  'Vary',
+  'Via',
+  'WWW-Authenticate',
+  'X-Content-Type-Options',
+  'X-DNS-Prefetch-Control',
+  'X-Frame-Options',
+  'X-Permitted-Cross-Domain-Policies',
+  'X-Powered-By',
+  'X-Requested-With',
+  'X-XSS-Protection'
+]
+
+for (let i = 0; i < wellknownHeaderNames.length; ++i) {
+  const key = wellknownHeaderNames[i]
+  const lowerCasedKey = key.toLowerCase()
+  headerNameLowerCasedRecord[key] = headerNameLowerCasedRecord[lowerCasedKey] =
+    lowerCasedKey
+}
+
+// Note: object prototypes should not be able to be referenced. e.g. `Object#hasOwnProperty`.
+Object.setPrototypeOf(headerNameLowerCasedRecord, null)
+
+module.exports = {
+  wellknownHeaderNames,
+  headerNameLowerCasedRecord
+}
+
+
 /***/ }),
 
 /***/ 2940:
@@ -9963,6 +10085,7 @@ const { InvalidArgumentError } = __nccwpck_require__(2940)
 const { Blob } = __nccwpck_require__(4300)
 const nodeUtil = __nccwpck_require__(3837)
 const { stringify } = __nccwpck_require__(3477)
+const { headerNameLowerCasedRecord } = __nccwpck_require__(4002)
 
 const [nodeMajor, nodeMinor] = process.versions.node.split('.').map(v => Number(v))
 
@@ -10172,6 +10295,15 @@ function parseKeepAliveTimeout (val) {
   return m ? parseInt(m[1], 10) * 1000 : null
 }
 
+/**
+ * Retrieves a header name and returns its lowercase value.
+ * @param {string | Buffer} value Header name
+ * @returns {string}
+ */
+function headerNameToString (value) {
+  return headerNameLowerCasedRecord[value] || value.toLowerCase()
+}
+
 function parseHeaders (headers, obj = {}) {
   // For H2 support
   if (!Array.isArray(headers)) return headers
@@ -10443,6 +10575,7 @@ module.exports = {
   isIterable,
   isAsyncIterable,
   isDestroyed,
+  headerNameToString,
   parseRawHeaders,
   parseHeaders,
   parseKeepAliveTimeout,
@@ -17090,14 +17223,18 @@ const { isBlobLike, toUSVString, ReadableStreamFrom } = __nccwpck_require__(9091
 const assert = __nccwpck_require__(9491)
 const { isUint8Array } = __nccwpck_require__(9830)
 
+let supportedHashes = []
+
 // https://nodejs.org/api/crypto.html#determining-if-crypto-support-is-unavailable
 /** @type {import('crypto')|undefined} */
 let crypto
 
 try {
   crypto = __nccwpck_require__(6113)
+  const possibleRelevantHashes = ['sha256', 'sha384', 'sha512']
+  supportedHashes = crypto.getHashes().filter((hash) => possibleRelevantHashes.includes(hash))
+/* c8 ignore next 3 */
 } catch {
-
 }
 
 function responseURL (response) {
@@ -17625,66 +17762,56 @@ function bytesMatch (bytes, metadataList) {
     return true
   }
 
-  // 3. If parsedMetadata is the empty set, return true.
+  // 3. If response is not eligible for integrity validation, return false.
+  // TODO
+
+  // 4. If parsedMetadata is the empty set, return true.
   if (parsedMetadata.length === 0) {
     return true
   }
 
-  // 4. Let metadata be the result of getting the strongest
+  // 5. Let metadata be the result of getting the strongest
   //    metadata from parsedMetadata.
-  const list = parsedMetadata.sort((c, d) => d.algo.localeCompare(c.algo))
-  // get the strongest algorithm
-  const strongest = list[0].algo
-  // get all entries that use the strongest algorithm; ignore weaker
-  const metadata = list.filter((item) => item.algo === strongest)
+  const strongest = getStrongestMetadata(parsedMetadata)
+  const metadata = filterMetadataListByAlgorithm(parsedMetadata, strongest)
 
-  // 5. For each item in metadata:
+  // 6. For each item in metadata:
   for (const item of metadata) {
     // 1. Let algorithm be the alg component of item.
     const algorithm = item.algo
 
     // 2. Let expectedValue be the val component of item.
-    let expectedValue = item.hash
+    const expectedValue = item.hash
 
     // See https://github.com/web-platform-tests/wpt/commit/e4c5cc7a5e48093220528dfdd1c4012dc3837a0e
     // "be liberal with padding". This is annoying, and it's not even in the spec.
 
-    if (expectedValue.endsWith('==')) {
-      expectedValue = expectedValue.slice(0, -2)
-    }
-
     // 3. Let actualValue be the result of applying algorithm to bytes.
     let actualValue = crypto.createHash(algorithm).update(bytes).digest('base64')
 
-    if (actualValue.endsWith('==')) {
-      actualValue = actualValue.slice(0, -2)
+    if (actualValue[actualValue.length - 1] === '=') {
+      if (actualValue[actualValue.length - 2] === '=') {
+        actualValue = actualValue.slice(0, -2)
+      } else {
+        actualValue = actualValue.slice(0, -1)
+      }
     }
 
     // 4. If actualValue is a case-sensitive match for expectedValue,
     //    return true.
-    if (actualValue === expectedValue) {
-      return true
-    }
-
-    let actualBase64URL = crypto.createHash(algorithm).update(bytes).digest('base64url')
-
-    if (actualBase64URL.endsWith('==')) {
-      actualBase64URL = actualBase64URL.slice(0, -2)
-    }
-
-    if (actualBase64URL === expectedValue) {
+    if (compareBase64Mixed(actualValue, expectedValue)) {
       return true
     }
   }
 
-  // 6. Return false.
+  // 7. Return false.
   return false
 }
 
 // https://w3c.github.io/webappsec-subresource-integrity/#grammardef-hash-with-options
 // https://www.w3.org/TR/CSP2/#source-list-syntax
 // https://www.rfc-editor.org/rfc/rfc5234#appendix-B.1
-const parseHashWithOptions = /((?<algo>sha256|sha384|sha512)-(?<hash>[A-z0-9+/]{1}.*={0,2}))( +[\x21-\x7e]?)?/i
+const parseHashWithOptions = /(?<algo>sha256|sha384|sha512)-((?<hash>[A-Za-z0-9+/]+|[A-Za-z0-9_-]+)={0,2}(?:\s|$)( +[!-~]*)?)?/i
 
 /**
  * @see https://w3c.github.io/webappsec-subresource-integrity/#parse-metadata
@@ -17698,8 +17825,6 @@ function parseMetadata (metadata) {
   // 2. Let empty be equal to true.
   let empty = true
 
-  const supportedHashes = crypto.getHashes()
-
   // 3. For each token returned by splitting metadata on spaces:
   for (const token of metadata.split(' ')) {
     // 1. Set empty to false.
@@ -17709,7 +17834,11 @@ function parseMetadata (metadata) {
     const parsedToken = parseHashWithOptions.exec(token)
 
     // 3. If token does not parse, continue to the next token.
-    if (parsedToken === null || parsedToken.groups === undefined) {
+    if (
+      parsedToken === null ||
+      parsedToken.groups === undefined ||
+      parsedToken.groups.algo === undefined
+    ) {
       // Note: Chromium blocks the request at this point, but Firefox
       // gives a warning that an invalid integrity was given. The
       // correct behavior is to ignore these, and subsequently not
@@ -17718,11 +17847,11 @@ function parseMetadata (metadata) {
     }
 
     // 4. Let algorithm be the hash-algo component of token.
-    const algorithm = parsedToken.groups.algo
+    const algorithm = parsedToken.groups.algo.toLowerCase()
 
     // 5. If algorithm is a hash function recognized by the user
     //    agent, add the parsed token to result.
-    if (supportedHashes.includes(algorithm.toLowerCase())) {
+    if (supportedHashes.includes(algorithm)) {
       result.push(parsedToken.groups)
     }
   }
@@ -17735,6 +17864,82 @@ function parseMetadata (metadata) {
   return result
 }
 
+/**
+ * @param {{ algo: 'sha256' | 'sha384' | 'sha512' }[]} metadataList
+ */
+function getStrongestMetadata (metadataList) {
+  // Let algorithm be the algo component of the first item in metadataList.
+  // Can be sha256
+  let algorithm = metadataList[0].algo
+  // If the algorithm is sha512, then it is the strongest
+  // and we can return immediately
+  if (algorithm[3] === '5') {
+    return algorithm
+  }
+
+  for (let i = 1; i < metadataList.length; ++i) {
+    const metadata = metadataList[i]
+    // If the algorithm is sha512, then it is the strongest
+    // and we can break the loop immediately
+    if (metadata.algo[3] === '5') {
+      algorithm = 'sha512'
+      break
+    // If the algorithm is sha384, then a potential sha256 or sha384 is ignored
+    } else if (algorithm[3] === '3') {
+      continue
+    // algorithm is sha256, check if algorithm is sha384 and if so, set it as
+    // the strongest
+    } else if (metadata.algo[3] === '3') {
+      algorithm = 'sha384'
+    }
+  }
+  return algorithm
+}
+
+function filterMetadataListByAlgorithm (metadataList, algorithm) {
+  if (metadataList.length === 1) {
+    return metadataList
+  }
+
+  let pos = 0
+  for (let i = 0; i < metadataList.length; ++i) {
+    if (metadataList[i].algo === algorithm) {
+      metadataList[pos++] = metadataList[i]
+    }
+  }
+
+  metadataList.length = pos
+
+  return metadataList
+}
+
+/**
+ * Compares two base64 strings, allowing for base64url
+ * in the second string.
+ *
+* @param {string} actualValue always base64
+ * @param {string} expectedValue base64 or base64url
+ * @returns {boolean}
+ */
+function compareBase64Mixed (actualValue, expectedValue) {
+  if (actualValue.length !== expectedValue.length) {
+    return false
+  }
+  for (let i = 0; i < actualValue.length; ++i) {
+    if (actualValue[i] !== expectedValue[i]) {
+      if (
+        (actualValue[i] === '+' && expectedValue[i] === '-') ||
+        (actualValue[i] === '/' && expectedValue[i] === '_')
+      ) {
+        continue
+      }
+      return false
+    }
+  }
+
+  return true
+}
+
 // https://w3c.github.io/webappsec-upgrade-insecure-requests/#upgrade-request
 function tryUpgradeRequestToAPotentiallyTrustworthyURL (request) {
   // TODO
@@ -18150,7 +18355,8 @@ module.exports = {
   urlHasHttpsScheme,
   urlIsHttpHttpsScheme,
   readAllBytes,
-  normalizeMethodRecord
+  normalizeMethodRecord,
+  parseMetadata
 }
 
 
@@ -20237,12 +20443,17 @@ function parseLocation (statusCode, headers) {
 
 // https://tools.ietf.org/html/rfc7231#section-6.4.4
 function shouldRemoveHeader (header, removeContent, unknownOrigin) {
-  return (
-    (header.length === 4 && header.toString().toLowerCase() === 'host') ||
-    (removeContent && header.toString().toLowerCase().indexOf('content-') === 0) ||
-    (unknownOrigin && header.length === 13 && header.toString().toLowerCase() === 'authorization') ||
-    (unknownOrigin && header.length === 6 && header.toString().toLowerCase() === 'cookie')
-  )
+  if (header.length === 4) {
+    return util.headerNameToString(header) === 'host'
+  }
+  if (removeContent && util.headerNameToString(header).startsWith('content-')) {
+    return true
+  }
+  if (unknownOrigin && (header.length === 13 || header.length === 6 || header.length === 19)) {
+    const name = util.headerNameToString(header)
+    return name === 'authorization' || name === 'cookie' || name === 'proxy-authorization'
+  }
+  return false
 }
 
 // https://tools.ietf.org/html/rfc7231#section-6.4
@@ -25733,7 +25944,7 @@ Dicer.prototype._write = function (data, encoding, cb) {
   if (this._headerFirst && this._isPreamble) {
     if (!this._part) {
       this._part = new PartStream(this._partOpts)
-      if (this._events.preamble) { this.emit('preamble', this._part) } else { this._ignore() }
+      if (this.listenerCount('preamble') !== 0) { this.emit('preamble', this._part) } else { this._ignore() }
     }
     const r = this._hparser.push(data)
     if (!this._inHeader && r !== undefined && r < data.length) { data = data.slice(r) } else { return cb() }
@@ -25790,7 +26001,7 @@ Dicer.prototype._oninfo = function (isMatch, data, start, end) {
       }
     }
     if (this._dashes === 2) {
-      if ((start + i) < end && this._events.trailer) { this.emit('trailer', data.slice(start + i, end)) }
+      if ((start + i) < end && this.listenerCount('trailer') !== 0) { this.emit('trailer', data.slice(start + i, end)) }
       this.reset()
       this._finished = true
       // no more parts will be added
@@ -25808,7 +26019,13 @@ Dicer.prototype._oninfo = function (isMatch, data, start, end) {
     this._part._read = function (n) {
       self._unpause()
     }
-    if (this._isPreamble && this._events.preamble) { this.emit('preamble', this._part) } else if (this._isPreamble !== true && this._events.part) { this.emit('part', this._part) } else { this._ignore() }
+    if (this._isPreamble && this.listenerCount('preamble') !== 0) {
+      this.emit('preamble', this._part)
+    } else if (this._isPreamble !== true && this.listenerCount('part') !== 0) {
+      this.emit('part', this._part)
+    } else {
+      this._ignore()
+    }
     if (!this._isPreamble) { this._inHeader = true }
   }
   if (data && start < end && !this._ignoreData) {
@@ -26491,7 +26708,7 @@ function Multipart (boy, cfg) {
 
         ++nfiles
 
-        if (!boy._events.file) {
+        if (boy.listenerCount('file') === 0) {
           self.parser._ignore()
           return
         }
@@ -27020,7 +27237,7 @@ const decoders = {
     if (textDecoders.has(this.toString())) {
       try {
         return textDecoders.get(this).decode(data)
-      } catch (e) { }
+      } catch {}
     }
     return typeof data === 'string'
       ? data
diff --git a/yarn.lock b/yarn.lock
index d1458c5..bae7e3b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11,17 +11,17 @@
     uuid "^8.3.2"
 
 "@actions/http-client@^2.0.1", "@actions/http-client@^2.2.0":
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/@actions/http-client/-/http-client-2.2.0.tgz#f8239f375be6185fcd07765efdcf0031ad5df1a0"
-  integrity sha512-q+epW0trjVUUHboliPb4UF9g2msf+w61b32tAkFEwL/IwP0DQWgbCMM0Hbe3e3WXSKz5VcUXbzJQgy8Hkra/Lg==
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/@actions/http-client/-/http-client-2.2.1.tgz#ed3fe7a5a6d317ac1d39886b0bb999ded229bb38"
+  integrity sha512-KhC/cZsq7f8I4LfZSJKgCvEwfkE8o1538VoBeoGzokVLLnbFDEAdFD3UhoMklxo2un9NJVBdANOresx7vTHlHw==
   dependencies:
     tunnel "^0.0.6"
     undici "^5.25.4"
 
 "@fastify/busboy@^2.0.0":
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/@fastify/busboy/-/busboy-2.1.0.tgz#0709e9f4cb252351c609c6e6d8d6779a8d25edff"
-  integrity sha512-+KpH+QxZU7O4675t3mnkQKcZZg56u+K/Ct2K+N2AZYNVK8kyeo/bI18tI8aPm3tvNNRyTWfj6s5tnGNlcbQRsA==
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/@fastify/busboy/-/busboy-2.1.1.tgz#b9da6a878a371829a0502c9b6c1c143ef6663f4d"
+  integrity sha512-vBZP4NlzfOlerQTnba4aqZoMhE/a9HY7HRqoOPaETQcSQuWEIyZMHGfVu6w9wGtGK5fED5qRs2DteVCjOH60sA==
 
 tunnel@^0.0.6:
   version "0.0.6"
@@ -29,9 +29,9 @@ tunnel@^0.0.6:
   integrity sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg==
 
 undici@^5.25.4:
-  version "5.28.3"
-  resolved "https://registry.yarnpkg.com/undici/-/undici-5.28.3.tgz#a731e0eff2c3fcfd41c1169a869062be222d1e5b"
-  integrity sha512-3ItfzbrhDlINjaP0duwnNsKpDQk3acHI3gVJ1z4fmwMK31k5G9OVIAMLSIaP6w4FaGkaAkN6zaQO9LUvZ1t7VA==
+  version "5.28.4"
+  resolved "https://registry.yarnpkg.com/undici/-/undici-5.28.4.tgz#6b280408edb6a1a604a9b20340f45b422e373068"
+  integrity sha512-72RFADWFqKmUb2hmmvNODKL3p9hcB6Gt2DOQMis1SEBaV6a4MH8soBvzg+95CYhCKPFedut2JY9bMfrDl9D23g==
   dependencies:
     "@fastify/busboy" "^2.0.0"