diff --git a/.travis.yml b/.travis.yml
index 2a9b9e6..baa0031 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,3 @@
 language: node_js
 node_js:
-  - 0.4
-  - 0.6
   - 0.8
diff --git a/lib/tmp.js b/lib/tmp.js
index dd6e9c7..52add8c 100644
--- a/lib/tmp.js
+++ b/lib/tmp.js
@@ -10,6 +10,7 @@
 var
   fs     = require('fs'),
   path   = require('path'),
+  os     = require('os'),
   exists = fs.exists || path.exists,
   _c     = require('constants');
 
@@ -18,7 +19,7 @@ var
  */
 var
   // store the actual TMP directory
-  _TMP = _getTMPDir(),
+  _TMP = os.tmpDir()
 
   // the random characters to choose from
   randomChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz",
@@ -27,25 +28,6 @@ var
   // this will hold the objects need to be removed on exit
   _removeObjects = [];
 
-/**
- * Gets the temp directory.
- *
- * @return {String}
- * @api private
- */
-function _getTMPDir() {
-  var tmpNames = [ 'TMPDIR', 'TMP', 'TEMP' ];
-
-  for (var i = 0, length = tmpNames.length; i < length; i++) {
-    if (_isUndefined(process.env[tmpNames[i]])) continue;
-
-    return process.env[tmpNames[i]];
-  }
-
-  // fallback to the default
-  return '/tmp';
-}
-
 /**
  * Checks whether the `obj` parameter is defined or not.
  *
diff --git a/package.json b/package.json
index 9e94d07..30ad05f 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   },
 
   "engines": {
-    "node": ">=0.4.0"
+    "node": ">=0.8.0"
   },
 
   "dependencies": {},