diff --git a/shadowsocks-csharp/Data/libsodium.dll.gz b/shadowsocks-csharp/Data/libsodium.dll.gz
deleted file mode 100755
index b4330a35..00000000
Binary files a/shadowsocks-csharp/Data/libsodium.dll.gz and /dev/null differ
diff --git a/shadowsocks-csharp/Data/libsscrypto.dll.gz b/shadowsocks-csharp/Data/libsscrypto.dll.gz
new file mode 100755
index 00000000..dfba9cdc
Binary files /dev/null and b/shadowsocks-csharp/Data/libsscrypto.dll.gz differ
diff --git a/shadowsocks-csharp/Data/polarssl.dll.gz b/shadowsocks-csharp/Data/polarssl.dll.gz
deleted file mode 100755
index 04a8f0a7..00000000
Binary files a/shadowsocks-csharp/Data/polarssl.dll.gz and /dev/null differ
diff --git a/shadowsocks-csharp/Encrypt/PolarSSL.cs b/shadowsocks-csharp/Encrypt/PolarSSL.cs
index 94659c80..a76882b6 100755
--- a/shadowsocks-csharp/Encrypt/PolarSSL.cs
+++ b/shadowsocks-csharp/Encrypt/PolarSSL.cs
@@ -10,7 +10,7 @@ namespace Shadowsocks.Encrypt
 {
     public class PolarSSL
     {
-        const string DLLNAME = "polarssl";
+        const string DLLNAME = "libsscrypto";
 
         public const int AES_CTX_SIZE = 8 + 4 * 68;
         public const int AES_ENCRYPT = 1;
@@ -19,16 +19,19 @@ namespace Shadowsocks.Encrypt
         static PolarSSL()
         {
             string tempPath = Path.GetTempPath();
-            string dllPath = tempPath + "/polarssl.dll";
+            string dllPath = tempPath + "/libsscrypto.dll";
             try
             {
-                FileManager.UncompressFile(dllPath, Resources.polarssl_dll);
+                FileManager.UncompressFile(dllPath, Resources.libsscrypto_dll);
+                LoadLibrary(dllPath);
             }
-            catch (IOException e)
+            catch (IOException)
+            {
+            }
+            catch (Exception e)
             {
                 Console.WriteLine(e.ToString());
             }
-            LoadLibrary(dllPath);
         }
 
         [DllImport("Kernel32.dll")]
diff --git a/shadowsocks-csharp/Encrypt/Sodium.cs b/shadowsocks-csharp/Encrypt/Sodium.cs
index 14f75872..1fd6cc55 100755
--- a/shadowsocks-csharp/Encrypt/Sodium.cs
+++ b/shadowsocks-csharp/Encrypt/Sodium.cs
@@ -10,21 +10,24 @@ namespace Shadowsocks.Encrypt
 {
     public class Sodium
     {
-        const string DLLNAME = "libsodium";
+        const string DLLNAME = "libsscrypto";
 
         static Sodium()
         {
             string tempPath = Path.GetTempPath();
-            string dllPath = tempPath + "/libsodium.dll";
+            string dllPath = tempPath + "/libsscrypto.dll";
             try
             {
-                FileManager.UncompressFile(dllPath, Resources.libsodium_dll);
+                FileManager.UncompressFile(dllPath, Resources.libsscrypto_dll);
+                LoadLibrary(dllPath);
             }
-            catch (IOException e)
+            catch (IOException)
+            {
+            }
+            catch (Exception e)
             {
                 Console.WriteLine(e.ToString());
             }
-            LoadLibrary(dllPath);
         }
 
         [DllImport("Kernel32.dll")]
diff --git a/shadowsocks-csharp/Properties/Resources.Designer.cs b/shadowsocks-csharp/Properties/Resources.Designer.cs
index ffc24b33..906e4d12 100755
--- a/shadowsocks-csharp/Properties/Resources.Designer.cs
+++ b/shadowsocks-csharp/Properties/Resources.Designer.cs
@@ -63,19 +63,9 @@ namespace Shadowsocks.Properties {
         /// <summary>
         ///   Looks up a localized resource of type System.Byte[].
         /// </summary>
-        internal static byte[] libsodium_dll {
+        internal static byte[] libsscrypto_dll {
             get {
-                object obj = ResourceManager.GetObject("libsodium_dll", resourceCulture);
-                return ((byte[])(obj));
-            }
-        }
-        
-        /// <summary>
-        ///   Looks up a localized resource of type System.Byte[].
-        /// </summary>
-        internal static byte[] polarssl_dll {
-            get {
-                object obj = ResourceManager.GetObject("polarssl_dll", resourceCulture);
+                object obj = ResourceManager.GetObject("libsscrypto_dll", resourceCulture);
                 return ((byte[])(obj));
             }
         }
diff --git a/shadowsocks-csharp/Properties/Resources.resx b/shadowsocks-csharp/Properties/Resources.resx
index 4b6f8f3e..b28e1d17 100755
--- a/shadowsocks-csharp/Properties/Resources.resx
+++ b/shadowsocks-csharp/Properties/Resources.resx
@@ -118,11 +118,8 @@
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
-  <data name="libsodium_dll" type="System.Resources.ResXFileRef, System.Windows.Forms">
-    <value>..\data\libsodium.dll.gz;System.Byte[], mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-  </data>
-  <data name="polarssl_dll" type="System.Resources.ResXFileRef, System.Windows.Forms">
-    <value>..\Data\polarssl.dll.gz;System.Byte[], mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  <data name="libsscrypto_dll" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\data\libsscrypto.dll.gz;System.Byte[], mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </data>
   <data name="polipo_config" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Data\polipo_config.txt;System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089;gb2312</value>
diff --git a/shadowsocks-csharp/shadowsocks-csharp.csproj b/shadowsocks-csharp/shadowsocks-csharp.csproj
index 06f5bc3a..9aca827b 100755
--- a/shadowsocks-csharp/shadowsocks-csharp.csproj
+++ b/shadowsocks-csharp/shadowsocks-csharp.csproj
@@ -129,6 +129,7 @@
       <SubType>Designer</SubType>
     </None>
     <None Include="Data\libsodium.dll.gz" />
+    <None Include="Data\libsscrypto.dll.gz" />
     <None Include="Data\polarssl.dll.gz" />
     <None Include="Data\polipo.exe.gz" />
     <None Include="Properties\Settings.settings">