diff --git a/0045-add-dataack-when-recv-too-many-acks-with-data.patch b/0045-add-dataack-when-recv-too-many-acks-with-data.patch
index d69cfef..9926540 100644
--- a/0045-add-dataack-when-recv-too-many-acks-with-data.patch
+++ b/0045-add-dataack-when-recv-too-many-acks-with-data.patch
@@ -1,16 +1,16 @@
-From 710841b579e1be0f6428cb71e4ebb4c90694d9b3 Mon Sep 17 00:00:00 2001
+From fe99dca0fa972f3c934a91e587380f140e093306 Mon Sep 17 00:00:00 2001
 From: kircher <majun65@huawei.com>
-Date: Tue, 20 Dec 2022 19:06:35 +0800
+Date: Wed, 21 Dec 2022 17:34:17 +0800
 Subject: [PATCH] add dataack when recv too many acks with data
 
 ---
- src/core/tcp_in.c      | 19 +++++++++++++++++++
+ src/core/tcp_in.c      | 22 ++++++++++++++++++++++
  src/include/lwip/tcp.h |  1 +
  src/include/lwipopts.h |  2 ++
- 3 files changed, 22 insertions(+)
+ 3 files changed, 25 insertions(+)
 
 diff --git a/src/core/tcp_in.c b/src/core/tcp_in.c
-index a5aebb4..88b6428 100644
+index a5aebb4..9e84889 100644
 --- a/src/core/tcp_in.c
 +++ b/src/core/tcp_in.c
 @@ -1259,6 +1259,7 @@ tcp_receive(struct tcp_pcb *pcb)
@@ -21,7 +21,7 @@ index a5aebb4..88b6428 100644
  
    LWIP_ASSERT("tcp_receive: invalid pcb", pcb != NULL);
    LWIP_ASSERT("tcp_receive: wrong state", pcb->state >= ESTABLISHED);
-@@ -1336,11 +1337,28 @@ tcp_receive(struct tcp_pcb *pcb)
+@@ -1336,11 +1337,31 @@ tcp_receive(struct tcp_pcb *pcb)
            }
          }
        }
@@ -33,7 +33,10 @@ index a5aebb4..88b6428 100644
 +              found_dataack = 1;
 +              ++pcb->dataacks;
 +              if (pcb->dataacks > MAX_DATA_ACK_NUM) {
-+                tcp_rexmit_fast(pcb);
++                if (tcp_rexmit(pcb) == ERR_OK) {
++                  pcb->rtime = 0;
++                  pcb->dataacks = 0;
++                }
 +              }
 +            }
 +          }
@@ -50,7 +53,7 @@ index a5aebb4..88b6428 100644
      } else if (TCP_SEQ_BETWEEN(ackno, pcb->lastack + 1, pcb->snd_nxt)) {
        /* We come here when the ACK acknowledges new data. */
        tcpwnd_size_t acked;
-@@ -1366,6 +1384,7 @@ tcp_receive(struct tcp_pcb *pcb)
+@@ -1366,6 +1387,7 @@ tcp_receive(struct tcp_pcb *pcb)
        /* Reset the fast retransmit variables. */
        pcb->dupacks = 0;
        pcb->lastack = ackno;
diff --git a/lwip.spec b/lwip.spec
index 8c1a7c9..db23a51 100644
--- a/lwip.spec
+++ b/lwip.spec
@@ -4,7 +4,7 @@
 Summary: lwip is a small independent implementation of the TCP/IP protocol suite
 Name:    lwip
 Version: 2.1.2
-Release: 23
+Release: 24
 License: BSD
 URL:     http://savannah.nongnu.org/projects/lwip/
 Source0: http://download.savannah.nongnu.org/releases/lwip/%{name}-%{version}.zip
@@ -135,6 +135,9 @@ cd %{_builddir}/%{name}-%{version}/src
 %{_libdir}/liblwip.a
 
 %changelog
+* Wed Dec 21 2022 kircher<majun65@huawei.com> - 2.1.2-24
+- do not update cwnd when send dataack
+
 * Tue Dec 20 2022 kircher<majun65@huawei.com> - 2.1.2-23
 - fix dataack is always lower than 256