diff --git a/src/Job.js b/src/Job.js
index d3a175b..2f395ec 100644
--- a/src/Job.js
+++ b/src/Job.js
@@ -65,7 +65,7 @@ module.exports = function (grunt) {
     var requestParams = {
       method: 'POST',
       url: ['https://saucelabs.com/rest/v1', this.user, 'js-tests'].join('/'),
-      auth: { user: this.user, pass: this.key },
+      auth: { user: this.user, pass: this.key() },
       json: {
         platforms: [this.platform],
         url: this.url,
@@ -141,7 +141,7 @@ module.exports = function (grunt) {
         .makeRequest({
           method: 'POST',
           url: ['https://saucelabs.com/rest/v1', me.user, 'js-tests/status'].join('/'),
-          auth: { user: me.user, pass: me.key },
+          auth: { user: me.user, pass: me.key() },
           json: { 'js tests': [me.taskId] }
         })
         .then(function (body) {
@@ -182,7 +182,7 @@ module.exports = function (grunt) {
     return utils.makeRequest({
       method: 'PUT',
       url: ['https://saucelabs.com/rest/v1', this.user, 'jobs', this.id, 'stop'].join('/'),
-      auth: { user: this.user, pass: this.key }
+      auth: { user: this.user, pass: this.key() }
     });
   };
 
@@ -196,7 +196,7 @@ module.exports = function (grunt) {
     return utils.makeRequest({
       method: 'DELETE',
       url: ['https://saucelabs.com/rest/v1', this.user, 'jobs', this.id].join('/'),
-      auth: { user: this.user, pass: this.key }
+      auth: { user: this.user, pass: this.key() }
     });
   };
 
diff --git a/tasks/saucelabs.js b/tasks/saucelabs.js
index cfa96c9..389c03f 100644
--- a/tasks/saucelabs.js
+++ b/tasks/saucelabs.js
@@ -77,7 +77,7 @@ module.exports = function (grunt) {
       type: 'tunnelOpen'
     });
 
-    tunnel = new SauceTunnel(arg.username, arg.key, arg.identifier, true, ['-P', '0'].concat(arg.tunnelArgs));
+    tunnel = new SauceTunnel(arg.username, arg.key(), arg.identifier, true, ['-P', '0'].concat(arg.tunnelArgs));
 
     ['write', 'writeln', 'error', 'ok', 'debug'].forEach(function (method) {
       tunnel.on('log:' + method, function (text) {
@@ -161,7 +161,6 @@ module.exports = function (grunt) {
 
   var defaults = {
     username: process.env.SAUCE_USERNAME,
-    key: process.env.SAUCE_ACCESS_KEY,
     tunneled: true,
     identifier: Math.floor((new Date()).getTime() / 1000 - 1230768000).toString(),
     pollInterval: 1000 * 2,
@@ -173,6 +172,27 @@ module.exports = function (grunt) {
     maxRetries: 0
   };
 
+  // Grunt will print the options hash to console.log when run in verbose
+  // mode. This can cause credential leaks per issue #203. This block will allow
+  // assignments so it can integrate with Grunt's APIs, but it will always
+  // return the getter as a function so that the 'toString' and 'toJSON' can be
+  // overidden.
+  var key = process.env.SAUCE_ACCESS_KEY;
+  Object.defineProperty(defaults, 'key', {
+    enumerable: true,
+    configurable: false,
+    writeable: true,
+    set: function (newKey) {
+      key = newKey;
+    },
+    get: function () {
+      var get = function () { return key; };
+      get.toString = function () { return key ? "[hidden]" : undefined; };
+      get.toJSON = get.toString;
+      return get;
+    }
+  });
+
   grunt.registerMultiTask('saucelabs-jasmine', 'Run Jasmine test cases using Sauce Labs browsers', function () {
     var done = this.async();
     var arg = this.options(defaults);