diff --git a/webrtc/Nack.cpp b/webrtc/Nack.cpp
index 5ac35b2f..8f6fd74b 100644
--- a/webrtc/Nack.cpp
+++ b/webrtc/Nack.cpp
@@ -14,7 +14,7 @@ using namespace std;
 using namespace toolkit;
 using namespace mediakit;
 
-static constexpr uint32_t kMaxNackMS = 10 * 1000;
+static constexpr uint32_t kMaxNackMS = 5 * 1000;
 
 void NackList::pushBack(RtpPacket::Ptr rtp) {
     auto seq = rtp->getSeq();