diff --git a/dist/index.js b/dist/index.js
index 33e0ba7..90200ef 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -987,6 +987,54 @@ if (!exports.IsPost) {
 }
 
 
+/***/ }),
+
+/***/ 197:
+/***/ (function(module, __unusedexports, __webpack_require__) {
+
+module.exports = isexe
+isexe.sync = sync
+
+var fs = __webpack_require__(747)
+
+function isexe (path, options, cb) {
+  fs.stat(path, function (er, stat) {
+    cb(er, er ? false : checkStat(stat, options))
+  })
+}
+
+function sync (path, options) {
+  return checkStat(fs.statSync(path), options)
+}
+
+function checkStat (stat, options) {
+  return stat.isFile() && checkMode(stat, options)
+}
+
+function checkMode (stat, options) {
+  var mod = stat.mode
+  var uid = stat.uid
+  var gid = stat.gid
+
+  var myUid = options.uid !== undefined ?
+    options.uid : process.getuid && process.getuid()
+  var myGid = options.gid !== undefined ?
+    options.gid : process.getgid && process.getgid()
+
+  var u = parseInt('100', 8)
+  var g = parseInt('010', 8)
+  var o = parseInt('001', 8)
+  var ug = u | g
+
+  var ret = (mod & o) ||
+    (mod & g) && gid === myGid ||
+    (mod & u) && uid === myUid ||
+    (mod & ug) && myUid === 0
+
+  return ret
+}
+
+
 /***/ }),
 
 /***/ 198:
@@ -1108,17 +1156,28 @@ var __importStar = (this && this.__importStar) || function (mod) {
     result["default"] = mod;
     return result;
 };
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
 Object.defineProperty(exports, "__esModule", { value: true });
 const fs = __importStar(__webpack_require__(747));
 const path = __importStar(__webpack_require__(622));
 const os = __importStar(__webpack_require__(87));
 const exec = __importStar(__webpack_require__(807));
+const which_1 = __importDefault(__webpack_require__(814));
 exports.agentConfig = `default-cache-ttl 7200
 max-cache-ttl 31536000
 allow-preset-passphrase`;
 const getGpgPresetPassphrasePath = () => __awaiter(void 0, void 0, void 0, function* () {
+    let gpgPresetPassphrasePath;
+    gpgPresetPassphrasePath = yield which_1.default('gpg-preset-passphrase').then(resolvedPath => {
+        return resolvedPath;
+    });
+    if (gpgPresetPassphrasePath != '') {
+        return gpgPresetPassphrasePath;
+    }
     const { libexecdir: libexecdir } = yield exports.getDirs();
-    let gpgPresetPassphrasePath = path.join(libexecdir, 'gpg-preset-passphrase');
+    gpgPresetPassphrasePath = path.join(libexecdir, 'gpg-preset-passphrase');
     if (yield fs.existsSync(gpgPresetPassphrasePath)) {
         return gpgPresetPassphrasePath;
     }
@@ -1246,7 +1305,7 @@ exports.configureAgent = (config) => __awaiter(void 0, void 0, void 0, function*
 });
 exports.presetPassphrase = (keygrip, passphrase) => __awaiter(void 0, void 0, void 0, function* () {
     yield exec
-        .exec(yield getGpgPresetPassphrasePath(), ['--verbose', '--preset', '--passphrase', `"${passphrase}"`, keygrip], true)
+        .exec(`"${yield getGpgPresetPassphrasePath()}" --verbose --preset --passphrase "${passphrase}" ${keygrip}`, [], true)
         .then(res => {
         if (res.stderr != '' && !res.success) {
             throw new Error(res.stderr);
@@ -45565,6 +45624,70 @@ exports.default = AsyncProxy;
 });
 
 
+/***/ }),
+
+/***/ 742:
+/***/ (function(module, __unusedexports, __webpack_require__) {
+
+var fs = __webpack_require__(747)
+var core
+if (process.platform === 'win32' || global.TESTING_WINDOWS) {
+  core = __webpack_require__(818)
+} else {
+  core = __webpack_require__(197)
+}
+
+module.exports = isexe
+isexe.sync = sync
+
+function isexe (path, options, cb) {
+  if (typeof options === 'function') {
+    cb = options
+    options = {}
+  }
+
+  if (!cb) {
+    if (typeof Promise !== 'function') {
+      throw new TypeError('callback not provided')
+    }
+
+    return new Promise(function (resolve, reject) {
+      isexe(path, options || {}, function (er, is) {
+        if (er) {
+          reject(er)
+        } else {
+          resolve(is)
+        }
+      })
+    })
+  }
+
+  core(path, options || {}, function (er, is) {
+    // ignore EACCES because that just means we aren't allowed to run it
+    if (er) {
+      if (er.code === 'EACCES' || options && options.ignoreErrors) {
+        er = null
+        is = false
+      }
+    }
+    cb(er, is)
+  })
+}
+
+function sync (path, options) {
+  // my kingdom for a filtered catch
+  try {
+    return core.sync(path, options || {})
+  } catch (er) {
+    if (options && options.ignoreErrors || er.code === 'EACCES') {
+      return false
+    } else {
+      throw er
+    }
+  }
+}
+
+
 /***/ }),
 
 /***/ 747:
@@ -45676,6 +45799,187 @@ exports.exec = (command, args = [], silent) => __awaiter(void 0, void 0, void 0,
 });
 
 
+/***/ }),
+
+/***/ 814:
+/***/ (function(module, __unusedexports, __webpack_require__) {
+
+const isWindows = process.platform === 'win32' ||
+    process.env.OSTYPE === 'cygwin' ||
+    process.env.OSTYPE === 'msys'
+
+const path = __webpack_require__(622)
+const COLON = isWindows ? ';' : ':'
+const isexe = __webpack_require__(742)
+
+const getNotFoundError = (cmd) =>
+  Object.assign(new Error(`not found: ${cmd}`), { code: 'ENOENT' })
+
+const getPathInfo = (cmd, opt) => {
+  const colon = opt.colon || COLON
+
+  // If it has a slash, then we don't bother searching the pathenv.
+  // just check the file itself, and that's it.
+  const pathEnv = cmd.match(/\//) || isWindows && cmd.match(/\\/) ? ['']
+    : (
+      [
+        // windows always checks the cwd first
+        ...(isWindows ? [process.cwd()] : []),
+        ...(opt.path || process.env.PATH ||
+          /* istanbul ignore next: very unusual */ '').split(colon),
+      ]
+    )
+  const pathExtExe = isWindows
+    ? opt.pathExt || process.env.PATHEXT || '.EXE;.CMD;.BAT;.COM'
+    : ''
+  const pathExt = isWindows ? pathExtExe.split(colon) : ['']
+
+  if (isWindows) {
+    if (cmd.indexOf('.') !== -1 && pathExt[0] !== '')
+      pathExt.unshift('')
+  }
+
+  return {
+    pathEnv,
+    pathExt,
+    pathExtExe,
+  }
+}
+
+const which = (cmd, opt, cb) => {
+  if (typeof opt === 'function') {
+    cb = opt
+    opt = {}
+  }
+  if (!opt)
+    opt = {}
+
+  const { pathEnv, pathExt, pathExtExe } = getPathInfo(cmd, opt)
+  const found = []
+
+  const step = i => new Promise((resolve, reject) => {
+    if (i === pathEnv.length)
+      return opt.all && found.length ? resolve(found)
+        : reject(getNotFoundError(cmd))
+
+    const ppRaw = pathEnv[i]
+    const pathPart = /^".*"$/.test(ppRaw) ? ppRaw.slice(1, -1) : ppRaw
+
+    const pCmd = path.join(pathPart, cmd)
+    const p = !pathPart && /^\.[\\\/]/.test(cmd) ? cmd.slice(0, 2) + pCmd
+      : pCmd
+
+    resolve(subStep(p, i, 0))
+  })
+
+  const subStep = (p, i, ii) => new Promise((resolve, reject) => {
+    if (ii === pathExt.length)
+      return resolve(step(i + 1))
+    const ext = pathExt[ii]
+    isexe(p + ext, { pathExt: pathExtExe }, (er, is) => {
+      if (!er && is) {
+        if (opt.all)
+          found.push(p + ext)
+        else
+          return resolve(p + ext)
+      }
+      return resolve(subStep(p, i, ii + 1))
+    })
+  })
+
+  return cb ? step(0).then(res => cb(null, res), cb) : step(0)
+}
+
+const whichSync = (cmd, opt) => {
+  opt = opt || {}
+
+  const { pathEnv, pathExt, pathExtExe } = getPathInfo(cmd, opt)
+  const found = []
+
+  for (let i = 0; i < pathEnv.length; i ++) {
+    const ppRaw = pathEnv[i]
+    const pathPart = /^".*"$/.test(ppRaw) ? ppRaw.slice(1, -1) : ppRaw
+
+    const pCmd = path.join(pathPart, cmd)
+    const p = !pathPart && /^\.[\\\/]/.test(cmd) ? cmd.slice(0, 2) + pCmd
+      : pCmd
+
+    for (let j = 0; j < pathExt.length; j ++) {
+      const cur = p + pathExt[j]
+      try {
+        const is = isexe.sync(cur, { pathExt: pathExtExe })
+        if (is) {
+          if (opt.all)
+            found.push(cur)
+          else
+            return cur
+        }
+      } catch (ex) {}
+    }
+  }
+
+  if (opt.all && found.length)
+    return found
+
+  if (opt.nothrow)
+    return null
+
+  throw getNotFoundError(cmd)
+}
+
+module.exports = which
+which.sync = whichSync
+
+
+/***/ }),
+
+/***/ 818:
+/***/ (function(module, __unusedexports, __webpack_require__) {
+
+module.exports = isexe
+isexe.sync = sync
+
+var fs = __webpack_require__(747)
+
+function checkPathExt (path, options) {
+  var pathext = options.pathExt !== undefined ?
+    options.pathExt : process.env.PATHEXT
+
+  if (!pathext) {
+    return true
+  }
+
+  pathext = pathext.split(';')
+  if (pathext.indexOf('') !== -1) {
+    return true
+  }
+  for (var i = 0; i < pathext.length; i++) {
+    var p = pathext[i].toLowerCase()
+    if (p && path.substr(-p.length).toLowerCase() === p) {
+      return true
+    }
+  }
+  return false
+}
+
+function checkStat (stat, path, options) {
+  if (!stat.isSymbolicLink() && !stat.isFile()) {
+    return false
+  }
+  return checkPathExt(path, options)
+}
+
+function isexe (path, options, cb) {
+  fs.stat(path, function (er, stat) {
+    cb(er, er ? false : checkStat(stat, path, options))
+  })
+}
+
+function sync (path, options) {
+  return checkStat(fs.statSync(path), path, options)
+}
+
+
 /***/ }),
 
 /***/ 986:
diff --git a/package-lock.json b/package-lock.json
index 86206e2..5f0f827 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -916,6 +916,12 @@
       "integrity": "sha512-l42BggppR6zLmpfU6fq9HEa2oGPEI8yrSPL3GITjfRInppYFahObbIQOQK3UGxEnyQpltZLaPe75046NOZQikw==",
       "dev": true
     },
+    "@types/which": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/@types/which/-/which-1.3.2.tgz",
+      "integrity": "sha512-8oDqyLC7eD4HM307boe2QWKyuzdzWBj56xI/imSl2cpL+U3tCMaTAkMJ4ee5JBZ/FsOJlvRGeIShiZDAl1qERA==",
+      "dev": true
+    },
     "@types/yargs": {
       "version": "15.0.4",
       "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-15.0.4.tgz",
@@ -1562,6 +1568,16 @@
         "semver": "^5.5.0",
         "shebang-command": "^1.2.0",
         "which": "^1.2.9"
+      },
+      "dependencies": {
+        "which": {
+          "version": "1.3.1",
+          "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+          "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+          "requires": {
+            "isexe": "^2.0.0"
+          }
+        }
       }
     },
     "cssom": {
@@ -3571,6 +3587,16 @@
           "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
           "dev": true,
           "optional": true
+        },
+        "which": {
+          "version": "1.3.1",
+          "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+          "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "isexe": "^2.0.0"
+          }
         }
       }
     },
@@ -5145,9 +5171,9 @@
       }
     },
     "which": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
-      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+      "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
       "requires": {
         "isexe": "^2.0.0"
       }
diff --git a/package.json b/package.json
index 7aba938..a53cb15 100644
--- a/package.json
+++ b/package.json
@@ -25,12 +25,14 @@
     "@actions/core": "^1.2.3",
     "@actions/exec": "^1.0.4",
     "@actions/github": "^2.1.1",
-    "openpgp": "^4.10.4"
+    "openpgp": "^4.10.4",
+    "which": "^2.0.2"
   },
   "devDependencies": {
     "@types/jest": "^25.2.1",
     "@types/node": "^13.13.4",
     "@types/openpgp": "^4.4.10",
+    "@types/which": "^1.3.2",
     "@zeit/ncc": "^0.22.1",
     "jest": "^25.5.4",
     "jest-circus": "^25.5.4",
diff --git a/src/gpg.ts b/src/gpg.ts
index 6398890..71e188a 100644
--- a/src/gpg.ts
+++ b/src/gpg.ts
@@ -2,6 +2,7 @@ import * as fs from 'fs';
 import * as path from 'path';
 import * as os from 'os';
 import * as exec from './exec';
+import which from 'which';
 
 export const agentConfig = `default-cache-ttl 7200
 max-cache-ttl 31536000
@@ -20,9 +21,17 @@ export interface Dirs {
 }
 
 const getGpgPresetPassphrasePath = async (): Promise<string> => {
-  const {libexecdir: libexecdir} = await getDirs();
+  let gpgPresetPassphrasePath: string;
 
-  let gpgPresetPassphrasePath = path.join(libexecdir, 'gpg-preset-passphrase');
+  gpgPresetPassphrasePath = await which('gpg-preset-passphrase').then(resolvedPath => {
+    return resolvedPath;
+  });
+  if (gpgPresetPassphrasePath != '') {
+    return gpgPresetPassphrasePath;
+  }
+
+  const {libexecdir: libexecdir} = await getDirs();
+  gpgPresetPassphrasePath = path.join(libexecdir, 'gpg-preset-passphrase');
   if (await fs.existsSync(gpgPresetPassphrasePath)) {
     return gpgPresetPassphrasePath;
   }
@@ -163,8 +172,8 @@ export const configureAgent = async (config: string): Promise<void> => {
 export const presetPassphrase = async (keygrip: string, passphrase: string): Promise<string> => {
   await exec
     .exec(
-      await getGpgPresetPassphrasePath(),
-      ['--verbose', '--preset', '--passphrase', `"${passphrase}"`, keygrip],
+      `"${await getGpgPresetPassphrasePath()}" --verbose --preset --passphrase "${passphrase}" ${keygrip}`,
+      [],
       true
     )
     .then(res => {