diff --git a/deps/npm/node_modules/inherits/inherits.js b/deps/npm/node_modules/inherits/inherits.js
diff --git a/deps/npm/node_modules/inherits/package.json b/deps/npm/node_modules/inherits/package.json
diff --git a/deps/npm/node_modules/nopt/lib/nopt.js b/deps/npm/node_modules/nopt/lib/nopt.js
diff --git a/deps/npm/node_modules/nopt/package.json b/deps/npm/node_modules/nopt/package.json
diff --git a/deps/npm/node_modules/npmconf/package.json b/deps/npm/node_modules/npmconf/package.json
diff --git a/deps/npm/node_modules/read-installed/package.json b/deps/npm/node_modules/read-installed/package.json
diff --git a/deps/npm/node_modules/read-package-json/README.md b/deps/npm/node_modules/read-package-json/README.md
diff --git a/deps/npm/node_modules/read-package-json/package.json b/deps/npm/node_modules/read-package-json/package.json
diff --git a/deps/npm/node_modules/read/README.md b/deps/npm/node_modules/read/README.md
diff --git a/deps/npm/node_modules/read/lib/read.js b/deps/npm/node_modules/read/lib/read.js
diff --git a/deps/npm/node_modules/read/node_modules/mute-stream/README.md b/deps/npm/node_modules/read/node_modules/mute-stream/README.md
diff --git a/deps/npm/node_modules/read/node_modules/mute-stream/mute.js b/deps/npm/node_modules/read/node_modules/mute-stream/mute.js
diff --git a/deps/npm/node_modules/read/node_modules/mute-stream/package.json b/deps/npm/node_modules/read/node_modules/mute-stream/package.json
diff --git a/deps/npm/node_modules/read/node_modules/mute-stream/test/basic.js b/deps/npm/node_modules/read/node_modules/mute-stream/test/basic.js
diff --git a/deps/npm/node_modules/read/package.json b/deps/npm/node_modules/read/package.json
diff --git a/deps/npm/node_modules/read/rs.js b/deps/npm/node_modules/read/rs.js
diff --git a/deps/npm/node_modules/read/test/basic.js b/deps/npm/node_modules/read/test/basic.js
diff --git a/deps/npm/node_modules/read/test/defaults.js b/deps/npm/node_modules/read/test/defaults.js
diff --git a/deps/npm/node_modules/read/test/many.js b/deps/npm/node_modules/read/test/many.js
diff --git a/deps/npm/node_modules/rimraf/package.json b/deps/npm/node_modules/rimraf/package.json
diff --git a/deps/npm/node_modules/rimraf/rimraf.js b/deps/npm/node_modules/rimraf/rimraf.js
diff --git a/deps/npm/node_modules/semver/README.md b/deps/npm/node_modules/semver/README.md
diff --git a/deps/npm/node_modules/semver/bin/semver b/deps/npm/node_modules/semver/bin/semver
diff --git a/deps/npm/node_modules/semver/package.json b/deps/npm/node_modules/semver/package.json
diff --git a/deps/npm/node_modules/semver/r.js b/deps/npm/node_modules/semver/r.js
diff --git a/deps/npm/node_modules/semver/semver.browser.js b/deps/npm/node_modules/semver/semver.browser.js
diff --git a/deps/npm/node_modules/semver/semver.browser.js.gz b/deps/npm/node_modules/semver/semver.browser.js.gz
diff --git a/deps/npm/node_modules/semver/semver.js b/deps/npm/node_modules/semver/semver.js
diff --git a/deps/npm/node_modules/semver/semver.min.js b/deps/npm/node_modules/semver/semver.min.js
diff --git a/deps/npm/node_modules/semver/semver.min.js.gz b/deps/npm/node_modules/semver/semver.min.js.gz
diff --git a/deps/npm/node_modules/semver/test/index.js b/deps/npm/node_modules/semver/test/index.js
diff --git a/deps/npm/node_modules/sha/LICENSE b/deps/npm/node_modules/sha/LICENSE
diff --git a/deps/npm/node_modules/sha/README.md b/deps/npm/node_modules/sha/README.md
diff --git a/deps/npm/node_modules/sha/index.js b/deps/npm/node_modules/sha/index.js
diff --git a/deps/npm/node_modules/sha/package.json b/deps/npm/node_modules/sha/package.json
diff --git a/deps/npm/node_modules/tar/README.md b/deps/npm/node_modules/tar/README.md
diff --git a/deps/npm/node_modules/tar/lib/buffer-entry.js b/deps/npm/node_modules/tar/lib/buffer-entry.js
diff --git a/deps/npm/node_modules/tar/lib/entry.js b/deps/npm/node_modules/tar/lib/entry.js
diff --git a/deps/npm/node_modules/tar/lib/extended-header-writer.js b/deps/npm/node_modules/tar/lib/extended-header-writer.js
diff --git a/deps/npm/node_modules/tar/lib/extended-header.js b/deps/npm/node_modules/tar/lib/extended-header.js
diff --git a/deps/npm/node_modules/tar/package.json b/deps/npm/node_modules/tar/package.json
diff --git a/deps/npm/package.json b/deps/npm/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.3.4",
+  "version": "1.3.5",
   "name": "npm",
   "publishConfig": {
     "proprietary-attribs": false
@@ -40,14 +40,13 @@
     "abbrev": "~1.0.4",
     "graceful-fs": "~2.0.0",
     "minimatch": "~0.2.12",
-    "nopt": "~2.1.1",
+    "nopt": "~2.1.2",
     "rimraf": "~2.2.0",
     "request": "~2.21.0",
     "which": "1",
-    "tar": "~0.1.17",
+    "tar": "~0.1.18",
     "fstream": "~0.1.23",
-    "block-stream": "*",
-    "inherits": "1",
+    "block-stream": "0.0.7",
     "mkdirp": "~0.3.3",
     "read": "~1.0.4",
     "lru-cache": "~2.3.0",
@@ -67,11 +66,11 @@
     "lockfile": "~0.4.0",
     "retry": "~0.6.0",
     "once": "~1.1.1",
-    "npmconf": "~0.1.1",
+    "npmconf": "~0.1.2",
     "opener": "~1.3.0",
     "chmodr": "~0.1.0",
-    "cmd-shim": "~1.1.0",
-    "sha": "~1.0.1",
+    "cmd-shim": "~1.0.1",
+    "sha": "~1.2.1",
     "editor": "0.0.4",
     "child-process-close": "~0.1.1",
     "npm-user-validate": "0.0.3"

diff --git a/doc/api/events.markdown b/doc/api/events.markdown
@@ -119,12 +119,14 @@ Return the number of listeners for a given event.
 * `event` {String} The event name
 * `listener` {Function} The event handler function
 
-This event is emitted any time someone adds a new listener.
+This event is emitted any time someone adds a new listener.  It is unspecified
+if `listener` is in the list returned by `emitter.listeners(event)`.
 
 
 ### Event: 'removeListener'
 
 * `event` {String} The event name
 * `listener` {Function} The event handler function
 
-This event is emitted any time someone removes a listener.
+This event is emitted any time someone removes a listener.  It is unspecified
+if `listener` is in the list returned by `emitter.listeners(event)`.
diff --git a/doc/api/fs.markdown b/doc/api/fs.markdown
@@ -405,7 +405,7 @@ Read data from the file specified by `fd`.
 
 `buffer` is the buffer that the data will be written to.
 
-`offset` is offset within the buffer where reading will start.
+`offset` is the offset in the buffer to start writing at.
 
 `length` is an integer specifying the number of bytes to read.
 

diff --git a/doc/api/tls.markdown b/doc/api/tls.markdown
@@ -171,6 +171,10 @@ automatically set as a listener for the [secureConnection][] event.  The
     resumption. If `requestCert` is `true`, the default is MD5 hash value
     generated from command-line. Otherwise, the default is not provided.
 
+  - `secureProtocol`: The SSL method to use, e.g. `SSLv3_method` to force
+    SSL version 3. The possible values depend on your installation of
+    OpenSSL and are defined in the constant [SSL_METHODS][].
+
 Here is a simple example echo server:
 
     var tls = require('tls');

diff --git a/doc/blog/release/v0.10.14.md b/doc/blog/release/v0.10.14.md
@@ -0,0 +1,72 @@
+date: Thu Jul 25 13:35:41 PDT 2013
+version: 0.10.14
+category: release
+title: Node v0.10.14 (Stable)
+slug: node-v0-10-14-stable
+
+2013.07.25, Version 0.10.14 (Stable)
+
+* uv: Upgrade to v0.10.13
+
+* npm: Upgrade to v1.3.5
+
+* os: Don't report negative times in cpu info (Ben Noordhuis)
+
+* fs: Handle large UID and GID (Ben Noordhuis)
+
+* url: Fix edge-case when protocol is non-lowercase (Shuan Wang)
+
+* doc: Streams API Doc Rewrite (isaacs)
+
+* node: call MakeDomainCallback in all domain cases (Trevor Norris)
+
+* crypto: fix memory leak in LoadPKCS12 (Fedor Indutny)
+
+
+Source Code: http://nodejs.org/dist/v0.10.14/node-v0.10.14.tar.gz
+
+Macintosh Installer (Universal): http://nodejs.org/dist/v0.10.14/node-v0.10.14.pkg
+
+Windows Installer: http://nodejs.org/dist/v0.10.14/node-v0.10.14-x86.msi
+
+Windows x64 Installer: http://nodejs.org/dist/v0.10.14/x64/node-v0.10.14-x64.msi
+
+Windows x64 Files: http://nodejs.org/dist/v0.10.14/x64/
+
+Linux 32-bit Binary: http://nodejs.org/dist/v0.10.14/node-v0.10.14-linux-x86.tar.gz
+
+Linux 64-bit Binary: http://nodejs.org/dist/v0.10.14/node-v0.10.14-linux-x64.tar.gz
+
+Solaris 32-bit Binary: http://nodejs.org/dist/v0.10.14/node-v0.10.14-sunos-x86.tar.gz
+
+Solaris 64-bit Binary: http://nodejs.org/dist/v0.10.14/node-v0.10.14-sunos-x64.tar.gz
+
+Other release files: http://nodejs.org/dist/v0.10.14/
+
+Website: http://nodejs.org/docs/v0.10.14/
+
+Documentation: http://nodejs.org/docs/v0.10.14/api/
+
+Shasums:
+```
+f6a13dc93f677e9d71f15570ea3db2244c09b26e  node-v0.10.14-darwin-x64.tar.gz
+c7a456bb7bd7a3d46e4d4ed65b19458e8c937431  node-v0.10.14-darwin-x86.tar.gz
+9797f93df6085796ccad0f84a65fcdee46aaeedf  node-v0.10.14-linux-x64.tar.gz
+f40ade7d212be254a67994f86f598b1c1c0b7b4c  node-v0.10.14-linux-x86.tar.gz
+c187f1385224e8d4bc2b465d9677c060b399e268  node-v0.10.14-sunos-x64.tar.gz
+bd8edd17eff8928ccd0adedbe63ddf3631324148  node-v0.10.14-sunos-x86.tar.gz
+7654aacdcdc832387e479b2c3de731b3b6ca3d01  node-v0.10.14-x86.msi
+90892d5672a75baa761afd2f238c06d4fa58cfef  node-v0.10.14.pkg
+b5d27b36d25bd7d45e1bb52ce0e0fdfb49dde370  node-v0.10.14.tar.gz
+f2de9c77ed3914fd9139668581f970f8df698687  node.exe
+b2a767985060c0719569d8fcfe7ad7e5548d952c  node.exp
+fa035fd44672547f8424df4a461f0a48c4cfdb97  node.lib
+aaaf7b82f826dd2a0358223ea7f1a70ccf93bc77  node.pdb
+9758a6374055ebfb5a2d788e1f95ebb267a5c20b  pkgsrc/nodejs-ia32-0.10.14.tgz
+d8ca87abc993a042030d63bcae08e85a30eef4b8  pkgsrc/nodejs-x64-0.10.14.tgz
+b372293ff300dacae79c44603e878726e282b3a2  x64/node-v0.10.14-x64.msi
+293a240db1cd280907a16956d4d6bb72ad9ef02a  x64/node.exe
+9d03fa6d751359e174586190e757efbf61869d50  x64/node.exp
+8b4e097f17d4efe13a05bff7534bb23738821a9d  x64/node.lib
+0323632950aa90ed4bb083774b487f6287dae7a5  x64/node.pdb
+```
diff --git a/doc/blog/release/v0.10.15.md b/doc/blog/release/v0.10.15.md
@@ -0,0 +1,58 @@
+date: Thu Jul 25 16:57:47 PDT 2013
+version: 0.10.15
+category: release
+title: Node v0.10.15 (Stable)
+slug: node-v0-10-15-stable
+
+2013.07.25, Version 0.10.15 (Stable)
+
+* src: fix process.getuid() return value (Ben Noordhuis)
+
+
+Source Code: http://nodejs.org/dist/v0.10.15/node-v0.10.15.tar.gz
+
+Macintosh Installer (Universal): http://nodejs.org/dist/v0.10.15/node-v0.10.15.pkg
+
+Windows Installer: http://nodejs.org/dist/v0.10.15/node-v0.10.15-x86.msi
+
+Windows x64 Installer: http://nodejs.org/dist/v0.10.15/x64/node-v0.10.15-x64.msi
+
+Windows x64 Files: http://nodejs.org/dist/v0.10.15/x64/
+
+Linux 32-bit Binary: http://nodejs.org/dist/v0.10.15/node-v0.10.15-linux-x86.tar.gz
+
+Linux 64-bit Binary: http://nodejs.org/dist/v0.10.15/node-v0.10.15-linux-x64.tar.gz
+
+Solaris 32-bit Binary: http://nodejs.org/dist/v0.10.15/node-v0.10.15-sunos-x86.tar.gz
+
+Solaris 64-bit Binary: http://nodejs.org/dist/v0.10.15/node-v0.10.15-sunos-x64.tar.gz
+
+Other release files: http://nodejs.org/dist/v0.10.15/
+
+Website: http://nodejs.org/docs/v0.10.15/
+
+Documentation: http://nodejs.org/docs/v0.10.15/api/
+
+Shasums:
+```
+b812ba5b966b89180d1391a9de5ccd075fc84c65  node-v0.10.15-darwin-x64.tar.gz
+f07bed2a59040d7adf3a647c953c3942b132da5c  node-v0.10.15-darwin-x86.tar.gz
+d236ed82967eefa726ec144301728b6a32ab8d8d  node-v0.10.15-linux-x64.tar.gz
+5629f83b10dc95d899268c3387895085270bb9e1  node-v0.10.15-linux-x86.tar.gz
+408e52074146cfed792f20ea54e9eca4419164af  node-v0.10.15-sunos-x64.tar.gz
+01ed71a5b019c6a2b51750c2e287613be1df0d92  node-v0.10.15-sunos-x86.tar.gz
+18c72b9394a943136ad5446599c732bc5fd5af9a  node-v0.10.15-x86.msi
+9dba40ed9c511faa215586d0b0f535d4ae55016c  node-v0.10.15.pkg
+14174896de074c244b0ed2251a95d7163d5a5e87  node-v0.10.15.tar.gz
+fad9611a7f656b8097c97de7b2ed016f3f33c6f9  node.exe
+ee48f297215ce12ba87998ccc06760ab3e667573  node.exp
+11f354ebcccfb88133a529e6e1337185a3b60550  node.lib
+230fc683b097afd33583ede1ec1f41fe4dae414b  node.pdb
+9d349103a53f444d1f9835989e22ebf2c906e3c0  pkgsrc/nodejs-ia32-0.10.15.tgz
+bb1397b448bf2a58ce62fc3c51fb14633e840bbd  pkgsrc/nodejs-x64-0.10.15.tgz
+7c6fbdfe5c0154477f1dd8acd915c8c13766b9ae  x64/node-v0.10.15-x64.msi
+f273ef837b2bc3b8cf5b1b7a363b510cb230a9be  x64/node.exe
+57fcec104d9fd3af53286f15353c7cd75e961382  x64/node.exp
+86afa3785280a25d183ff46bfea3a845b6b506c0  x64/node.lib
+f6bc69a9c20c3965fd4969040cde9b43c7de50ff  x64/node.pdb
+```
diff --git a/doc/community/index.html b/doc/community/index.html
@@ -181,7 +181,11 @@ <h2 class="localized">Localized Sites</h2>
               <a href="http://www.nodejstr.com/">Node.js Türkiye</a>
               Node.js in Turkish<br>
               <a href="http://www.nodebr.com/">NodeBR.com</a>
-              Brazilian community of Node.js
+              Brazilian community of Node.js<br>
+              <a href="http://nodejs.org.au/">nodejs.org.au</a> Australian
+              Node.js blog &amp; developers listing<br>
+              <a href="http://nodejs.geek.nz/">nodejs.geek.nz</a>
+              Node.js site for Kiwis<br>
             </p>
           </div>
         </div>

diff --git a/doc/index.html b/doc/index.html
@@ -38,7 +38,7 @@
     <div id="quotes" class="clearfix">
         <h2>Node.js in the Industry</h2>
         <ul>
-            <li class="microsoft"><img src="http://nodejs.org/images/microsoft-logo.png">
+            <li class="microsoft"><img src="http://nodejs.org/images/microsoft-logo.png" height=34>
             <p>Node gives Azure users the first end-to-end JavaScript
             experience for the development of a whole new class of real-time
             applications.
@@ -48,7 +48,7 @@ <h2>Node.js in the Industry</h2>
             <span>Principal Program Manager, Microsoft Open Technologies, Inc.</span></p>
             </li>
 
-            <li class="ebay"><img src="http://nodejs.org/images/ebay-logo.png">
+            <li class="ebay"><img src="http://nodejs.org/images/ebay-logo.png" height=34>
             <p>Node’s evented I/O model freed us from worrying about locking
             and concurrency issues that are common with multithreaded async
             I/O.
@@ -57,7 +57,7 @@ <h2>Node.js in the Industry</h2>
             <br>
             <span>Principal Member, Technical Staff</span></p></li>
 
-            <li class="linkedin"><img src="http://nodejs.org/images/linkedin-logo.png">
+            <li class="linkedin"><img src="http://nodejs.org/images/linkedin-logo.png" height=34>
             <p>On the server side, our entire mobile software stack is
             completely built in Node. One reason was scale. The second is
             Node showed us huge performance gains.
@@ -66,7 +66,7 @@ <h2>Node.js in the Industry</h2>
             <br>
             <span>Director of Engineering, Mobile</span></p></li>
 
-            <li class="yahoo"><img src="http://nodejs.org/images/yahoo-logo.png">
+            <li class="yahoo"><img src="http://nodejs.org/images/yahoo-logo.png" height=34>
             <p>Node.js is the execution core of Manhattan. Allowing
             developers to build one code base using one language – that is
             the nirvana for developers.

diff --git a/src/node_crypto.cc b/src/node_crypto.cc
@@ -2229,10 +2229,13 @@ void CipherBase::Update(const FunctionCallbackInfo<Value>& args) {
 
   // Only copy the data if we have to, because it's a string
   if (args[0]->IsString()) {
+    Local<String> string = args[0].As<String>();
     enum encoding encoding = ParseEncoding(args[1], BINARY);
-    size_t buflen = StringBytes::StorageSize(args[0], encoding);
+    if (!StringBytes::IsValidString(string, encoding))
+      return ThrowTypeError("Bad input string");
+    size_t buflen = StringBytes::StorageSize(string, encoding);
     char* buf = new char[buflen];
-    size_t written = StringBytes::Write(buf, buflen, args[0], encoding);
+    size_t written = StringBytes::Write(buf, buflen, string, encoding);
     r = cipher->Update(buf, written, &out, &out_len);
     delete[] buf;
   } else {
@@ -2377,10 +2380,13 @@ void Hmac::HmacUpdate(const FunctionCallbackInfo<Value>& args) {
   // Only copy the data if we have to, because it's a string
   bool r;
   if (args[0]->IsString()) {
+    Local<String> string = args[0].As<String>();
     enum encoding encoding = ParseEncoding(args[1], BINARY);
-    size_t buflen = StringBytes::StorageSize(args[0], encoding);
+    if (!StringBytes::IsValidString(string, encoding))
+      return ThrowTypeError("Bad input string");
+    size_t buflen = StringBytes::StorageSize(string, encoding);
     char* buf = new char[buflen];
-    size_t written = StringBytes::Write(buf, buflen, args[0], encoding);
+    size_t written = StringBytes::Write(buf, buflen, string, encoding);
     r = hmac->HmacUpdate(buf, written);
     delete[] buf;
   } else {
@@ -2492,10 +2498,13 @@ void Hash::HashUpdate(const FunctionCallbackInfo<Value>& args) {
   // Only copy the data if we have to, because it's a string
   bool r;
   if (args[0]->IsString()) {
+    Local<String> string = args[0].As<String>();
     enum encoding encoding = ParseEncoding(args[1], BINARY);
-    size_t buflen = StringBytes::StorageSize(args[0], encoding);
+    if (!StringBytes::IsValidString(string, encoding))
+      return ThrowTypeError("Bad input string");
+    size_t buflen = StringBytes::StorageSize(string, encoding);
     char* buf = new char[buflen];
-    size_t written = StringBytes::Write(buf, buflen, args[0], encoding);
+    size_t written = StringBytes::Write(buf, buflen, string, encoding);
     r = hash->HashUpdate(buf, written);
     delete[] buf;
   } else {
@@ -2604,10 +2613,13 @@ void Sign::SignUpdate(const FunctionCallbackInfo<Value>& args) {
   // Only copy the data if we have to, because it's a string
   int r;
   if (args[0]->IsString()) {
+    Local<String> string = args[0].As<String>();
     enum encoding encoding = ParseEncoding(args[1], BINARY);
-    size_t buflen = StringBytes::StorageSize(args[0], encoding);
+    if (!StringBytes::IsValidString(string, encoding))
+      return ThrowTypeError("Bad input string");
+    size_t buflen = StringBytes::StorageSize(string, encoding);
     char* buf = new char[buflen];
-    size_t written = StringBytes::Write(buf, buflen, args[0], encoding);
+    size_t written = StringBytes::Write(buf, buflen, string, encoding);
     r = sign->SignUpdate(buf, written);
     delete[] buf;
   } else {
@@ -2747,10 +2759,13 @@ void Verify::VerifyUpdate(const FunctionCallbackInfo<Value>& args) {
   // Only copy the data if we have to, because it's a string
   bool r;
   if (args[0]->IsString()) {
+    Local<String> string = args[0].As<String>();
     enum encoding encoding = ParseEncoding(args[1], BINARY);
-    size_t buflen = StringBytes::StorageSize(args[0], encoding);
+    if (!StringBytes::IsValidString(string, encoding))
+      return ThrowTypeError("Bad input string");
+    size_t buflen = StringBytes::StorageSize(string, encoding);
     char* buf = new char[buflen];
-    size_t written = StringBytes::Write(buf, buflen, args[0], encoding);
+    size_t written = StringBytes::Write(buf, buflen, string, encoding);
     r = verify->VerifyUpdate(buf, written);
     delete[] buf;
   } else {

diff --git a/src/node_file.cc b/src/node_file.cc
@@ -812,12 +812,12 @@ static void Chown(const FunctionCallbackInfo<Value>& args) {
   if (len < 2) return TYPE_ERROR("uid required");
   if (len < 3) return TYPE_ERROR("gid required");
   if (!args[0]->IsString()) return TYPE_ERROR("path must be a string");
-  if (!args[1]->IsInt32()) return TYPE_ERROR("uid must be an int");
-  if (!args[2]->IsInt32()) return TYPE_ERROR("gid must be an int");
+  if (!args[1]->IsUint32()) return TYPE_ERROR("uid must be an unsigned int");
+  if (!args[2]->IsUint32()) return TYPE_ERROR("gid must be an unsigned int");
 
   String::Utf8Value path(args[0]);
-  int uid = static_cast<int>(args[1]->Int32Value());
-  int gid = static_cast<int>(args[2]->Int32Value());
+  uv_uid_t uid = static_cast<uv_uid_t>(args[1]->Uint32Value());
+  uv_gid_t gid = static_cast<uv_gid_t>(args[2]->Uint32Value());
 
   if (args[3]->IsFunction()) {
     ASYNC_CALL(chown, args[3], *path, uid, gid);
@@ -838,12 +838,12 @@ static void FChown(const FunctionCallbackInfo<Value>& args) {
   if (len < 2) return TYPE_ERROR("uid required");
   if (len < 3) return TYPE_ERROR("gid required");
   if (!args[0]->IsInt32()) return TYPE_ERROR("fd must be an int");
-  if (!args[1]->IsInt32()) return TYPE_ERROR("uid must be an int");
-  if (!args[2]->IsInt32()) return TYPE_ERROR("gid must be an int");
+  if (!args[1]->IsUint32()) return TYPE_ERROR("uid must be an unsigned int");
+  if (!args[2]->IsUint32()) return TYPE_ERROR("gid must be an unsigned int");
 
   int fd = args[0]->Int32Value();
-  int uid = static_cast<int>(args[1]->Int32Value());
-  int gid = static_cast<int>(args[2]->Int32Value());
+  uv_uid_t uid = static_cast<uv_uid_t>(args[1]->Uint32Value());
+  uv_gid_t gid = static_cast<uv_gid_t>(args[2]->Uint32Value());
 
   if (args[3]->IsFunction()) {
     ASYNC_CALL(fchown, args[3], fd, uid, gid);