diff --git a/README.md b/README.md
index 3b84eb8708..07b2e834ef 100755
--- a/README.md
+++ b/README.md
@@ -335,6 +335,7 @@ Remark:
 
 ## History
 
+* v2.0, 2017-02-25, for [#730][bug #730], remove the test code. 2.0.234
 * v2.0, 2017-02-09, fix [#503][bug #503] disable utilities when reload a source. 2.0.233
 * v2.0, 2017-01-22, for [#752][bug #752] release the io then free it for kbps. 2.0.232
 * v2.0, 2017-01-18, fix [#750][bug #750] use specific error code for dns resolve. 2.0.231
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index 7b9c6f9070..8898fbdbc0 100644
--- a/trunk/src/core/srs_core.hpp
+++ b/trunk/src/core/srs_core.hpp
@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR       2
 #define VERSION_MINOR       0
-#define VERSION_REVISION    233
+#define VERSION_REVISION    234
 
 // generated by configure, only macros.
 #include <srs_auto_headers.hpp>
diff --git a/trunk/src/protocol/srs_rtmp_stack.cpp b/trunk/src/protocol/srs_rtmp_stack.cpp
index f44c3aa51d..9696357f81 100644
--- a/trunk/src/protocol/srs_rtmp_stack.cpp
+++ b/trunk/src/protocol/srs_rtmp_stack.cpp
@@ -1635,7 +1635,6 @@ int SrsProtocol::response_acknowledgement_message()
     
     SrsAcknowledgementPacket* pkt = new SrsAcknowledgementPacket();
     pkt->sequence_number = sequence_number;
-    srs_warn("ack sequence=%#x", sequence_number);
     
     // cache the message and use flush to send.
     if (!auto_response_when_recv) {