diff --git a/source/libs/transport/src/thttp.c b/source/libs/transport/src/thttp.c
index 76a7611c2e39289a817d675b91379811cf5484b1..b902fbd13a9a71fccd5a2797d9201575400bc88f 100644
--- a/source/libs/transport/src/thttp.c
+++ b/source/libs/transport/src/thttp.c
@@ -178,7 +178,7 @@ int32_t taosSendHttpReport(const char* server, uint16_t port, char* pCont, int32
   }
   terrno = 0;
 
-  char    header[1024] = {0};
+  char    header[2048] = {0};
   int32_t headLen = taosBuildHttpHeader(server, contLen, header, sizeof(header), flag);
 
   uv_buf_t* wb = taosMemoryCalloc(2, sizeof(uv_buf_t));