diff --git a/sources/src/main/java/com/ullink/slack/simpleslackapi/impl/SlackWebSocketSessionImpl.java b/sources/src/main/java/com/ullink/slack/simpleslackapi/impl/SlackWebSocketSessionImpl.java
index 47ba5e90..73f48f66 100644
--- a/sources/src/main/java/com/ullink/slack/simpleslackapi/impl/SlackWebSocketSessionImpl.java
+++ b/sources/src/main/java/com/ullink/slack/simpleslackapi/impl/SlackWebSocketSessionImpl.java
@@ -30,7 +30,6 @@
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.config.RequestConfig;
 import org.apache.http.client.entity.UrlEncodedFormEntity;
-import org.apache.http.client.methods.HttpGet;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.client.utils.URIBuilder;
 import org.apache.http.entity.ContentType;
@@ -381,7 +380,8 @@ private void connectImpl() throws IOException
     {
         LOGGER.info("connecting to slack");
         HttpClient httpClient = getHttpClient();
-        HttpGet request = new HttpGet(slackApiBase + "rtm.start?token=" + authToken);
+        HttpPost request = new HttpPost(slackApiBase + "rtm.start");
+        request.addHeader("Authorization", "Bearer " + authToken);
         HttpResponse response = httpClient.execute(request);
         LOGGER.debug(response.getStatusLine().toString());
         String jsonResponse = consumeToString(response.getEntity().getContent());