diff --git a/CHANGES b/CHANGES
index 0994c32..a1d6fca 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+1.4.3 2014-05-13
+- Fix Windows
+
 1.4.2 2014-05-10
 - Add salsa20-ctr cipher
 
diff --git a/README.md b/README.md
index 23b206a..857de7c 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 shadowsocks
 ===========
 
-Current version: 1.4.2 [![Build Status][1]][0]
+Current version: 1.4.3 [![Build Status][1]][0]
 
 shadowsocks is a lightweight tunnel proxy which can help you get through firewalls.
 
diff --git a/setup.py b/setup.py
index 3193fa9..1068689 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@ with open('README.rst') as f:
 
 setup(
     name="shadowsocks",
-    version="1.4.2",
+    version="1.4.3",
     license='MIT',
     description="a lightweight tunnel proxy",
     author='clowwindy',
diff --git a/shadowsocks/utils.py b/shadowsocks/utils.py
index 4da4a8b..f5bcba3 100644
--- a/shadowsocks/utils.py
+++ b/shadowsocks/utils.py
@@ -22,9 +22,53 @@
 # SOFTWARE.
 
 import os
+import socket
 import logging
 
 
+def inet_ntop(family, ipstr):
+    if family == socket.AF_INET:
+        return socket.inet_ntoa(ipstr)
+    elif family == socket.AF_INET6:
+        v6addr = ':'.join(('%02X%02X' % (ord(i), ord(j)))
+                          for i, j in zip(ipstr[::2], ipstr[1::2]))
+        return v6addr
+
+
+def inet_pton(family, addr):
+    if family == socket.AF_INET:
+        return socket.inet_aton(addr)
+    elif family == socket.AF_INET6:
+        if '.' in addr:  # a v4 addr
+            v4addr = addr[addr.rindex(':') + 1:]
+            v4addr = socket.inet_aton(v4addr)
+            v4addr = map(lambda x: ('%02X' % ord(x)), v4addr)
+            v4addr.insert(2, ':')
+            newaddr = addr[:addr.rindex(':') + 1] + ''.join(v4addr)
+            return inet_pton(family, newaddr)
+        dbyts = [0] * 8  # 8 groups
+        grps = addr.split(':')
+        for i, v in enumerate(grps):
+            if v:
+                dbyts[i] = int(v, 16)
+            else:
+                for j, w in enumerate(grps[::-1]):
+                    if w:
+                        dbyts[7 - j] = int(w, 16)
+                    else:
+                        break
+                break
+        return ''.join((chr(i // 256) + chr(i % 256)) for i in dbyts)
+    else:
+        raise RuntimeError("What family?")
+
+
+if not hasattr(socket, 'inet_pton'):
+    socket.inet_pton = inet_pton
+
+if not hasattr(socket, 'inet_ntop'):
+    socket.inet_ntop = inet_ntop
+
 def find_config():
     config_path = 'config.json'
     if os.path.exists(config_path):