diff --git a/shadowsocks-csharp/Model/Server.cs b/shadowsocks-csharp/Model/Server.cs
index 77fedba8..694effe0 100755
--- a/shadowsocks-csharp/Model/Server.cs
+++ b/shadowsocks-csharp/Model/Server.cs
@@ -10,10 +10,9 @@ namespace Shadowsocks.Model
     public class Server
     {
         public static readonly Regex
-            UrlFinder = new Regex("^(?i)ss://([A-Za-z0-9+-/=_]+)(#(.+))?$",
-                                  RegexOptions.IgnoreCase | RegexOptions.Compiled),
+            UrlFinder = new Regex("^(?i)ss://([A-Za-z0-9+-/=_]+)(#(.+))?$", RegexOptions.IgnoreCase),
             DetailsParser = new Regex("^((?<method>.+?)(?<auth>-auth)??:(?<password>.*)@(?<hostname>.+?)" +
-                                      ":(?<port>\\d+?))$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+                                      ":(?<port>\\d+?))$", RegexOptions.IgnoreCase);
 
         private const int DefaultServerTimeoutSec = 5;
         public const int MaxServerTimeoutSec = 20;