diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index 3ba985774..f6745dbb1 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -73,6 +73,7 @@ public class WebSocket : IDisposable
     #region Private Fields
 
     private AuthenticationChallenge        _authChallenge;
+    private string                         _authHeaderValue;
     private string                         _base64Key;
     private bool                           _client;
     private Action                         _closeContext;
@@ -1683,6 +1684,9 @@ private HttpRequest createHandshakeRequest ()
       if (ares != null)
         headers["Authorization"] = ares.ToString ();
 
+      if (!_authHeaderValue.IsNullOrEmpty ())
+        headers["Authorization"] = _authHeaderValue;
+
       var hasUserHeader = _userHeaders != null && _userHeaders.Count > 0;
 
       if (hasUserHeader)
@@ -4550,6 +4554,72 @@ public void SetUserHeader (string name, string value)
       }
     }
 
+    /// <summary>
+    /// Sets the Authorization request header to a specified string value.
+    /// </summary>
+    /// <param name="value">
+    /// A <see cref="string"/> that specifies the value of the Authorization request header to set.
+    /// </param>
+    /// <exception cref="ArgumentException">
+    /// <paramref name="value"/> contains an invalid character.
+    /// </exception>
+    /// <exception cref="ArgumentOutOfRangeException">
+    /// The length of <paramref name="value"/> is greater than 65,535
+    /// characters.
+    /// </exception>
+    /// <exception cref="InvalidOperationException">
+    ///   <para>
+    ///   This method is not available if the interface is not for the client.
+    ///   </para>
+    ///   <para>
+    ///   -or-
+    ///   </para>
+    ///   <para>
+    ///   This method is not available when the current state of the interface
+    ///   is neither New nor Closed.
+    ///   </para>
+    /// </exception>
+    public void SetAuthorizationHeader (string value)
+    {
+      if (!_client)
+      {
+        const string msg = "The interface is not for the client.";
+
+        throw new InvalidOperationException (msg);
+      }
+
+      var val = value != null ? value.Trim () : string.Empty;
+
+      if (val.Length > 0)
+      {
+        if (val.Length > 65535)
+        {
+          const string msg = "The length of that value is greater than 65,535 characters.";
+
+          throw new ArgumentOutOfRangeException (nameof(value), msg);
+        }
+
+        if (!val.IsText ())
+        {
+          const string msg = "That value contains an invalid character.";
+
+          throw new ArgumentException (msg, nameof(value));
+        }
+      }
+
+      lock (_forState)
+      {
+        if (!canSet ())
+        {
+          const string msg = "The current state of the interface is neither New nor Closed.";
+
+          throw new InvalidOperationException (msg);
+        }
+
+        _authHeaderValue = val.Length > 0 ? val : null;
+      }
+    }
+
     #endregion
 
     #region Explicit Interface Implementations