diff --git a/plugin/protocol/http2/src/http2_stream.cpp b/plugin/protocol/http2/src/http2_stream.cpp
index 9a2ca24..03e3bd7 100644
--- a/plugin/protocol/http2/src/http2_stream.cpp
+++ b/plugin/protocol/http2/src/http2_stream.cpp
@@ -954,15 +954,6 @@ nghttp2_submit_frame_settings(struct tfe_h2_stream *connection,const nghttp2_fra
 	nghttp2_session *ngh2_session = tfe_h2_stream_get_nghttp2_session(connection, dir);
 	nghttp2_session *ngh2_peer_session = tfe_h2_stream_get_nghttp2_peer_session(connection, dir);
 
-	if(settings.hd.flags == NGHTTP2_FLAG_ACK){
-		xret = nghttp2_session_send(ngh2_peer_session);
-		if (xret != 0) {
-			stream_action = ACTION_FORWARD_DATA;
-			TFE_LOG_ERROR(logger()->handle, "Fatal upstream send error: %s, %d\n",nghttp2_strerror(xret), __LINE__);
-		}
-		stream_action = ACTION_DROP_DATA;
-		return 0;
-	}
     rv = nghttp2_submit_settings(ngh2_session, settings.hd.flags,
                                  nghttp2_iv_packet(settings, iv), settings.niv);
     if (rv != 0) {
diff --git a/vendor/CMakeLists.txt b/vendor/CMakeLists.txt
index aa0b2f2..6cc452c 100644
--- a/vendor/CMakeLists.txt
+++ b/vendor/CMakeLists.txt
@@ -81,7 +81,7 @@ set_property(TARGET http-parser-static PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${
 ExternalProject_Add(nghttp2
         PREFIX nghttp2
         URL ${CMAKE_CURRENT_SOURCE_DIR}/nghttp2-1.24.0.tar.gz
-		URL_MD5 8b29f5c780f08d8111f953f9fa0fad0c
+		URL_MD5 3827e6feed304f09442336dbf781e023
         CONFIGURE_COMMAND ./configure --prefix=<INSTALL_DIR> --disable-shared
         BUILD_IN_SOURCE 1)
 
diff --git a/vendor/nghttp2-1.24.0.tar.gz b/vendor/nghttp2-1.24.0.tar.gz
index 8ec9aa9..6a2cc0e 100644
Binary files a/vendor/nghttp2-1.24.0.tar.gz and b/vendor/nghttp2-1.24.0.tar.gz differ