diff --git a/README.md b/README.md
index 390928519..15338e50d 100755
--- a/README.md
+++ b/README.md
@@ -201,6 +201,7 @@ For previous versions, please read:
 
 ## V3 changes
 
+* v3.0, 2020-10-14, Fix [#1987][bug #1987], Fix Kbps resample bug. 3.0.145
 * <strong>v3.0, 2020-10-10, [3.0 release1(3.0.144)][r3.0r1] released. 122674 lines.</strong>
 * v3.0, 2020-10-10, Fix [#1780][bug #1780], build fail on Ubuntu20(focal). 3.0.144
 * v3.0, 2020-09-14, Prevent stop ingest for multiple times. 3.0.143
@@ -1763,6 +1764,7 @@ Winlin
 [bug #1619]: https://github.com/ossrs/srs/issues/1619
 [bug #1629]: https://github.com/ossrs/srs/issues/1629
 [bug #1780]: https://github.com/ossrs/srs/issues/1780
+[bug #1987]: https://github.com/ossrs/srs/issues/1987
 [bug #yyyyyyyyyyyyy]: https://github.com/ossrs/srs/issues/yyyyyyyyyyyyy
 
 [bug #1631]: https://github.com/ossrs/srs/issues/1631
diff --git a/trunk/src/core/srs_core_version3.hpp b/trunk/src/core/srs_core_version3.hpp
index ef1590d42..6b933fbfc 100644
--- a/trunk/src/core/srs_core_version3.hpp
+++ b/trunk/src/core/srs_core_version3.hpp
@@ -24,6 +24,6 @@
 #ifndef SRS_CORE_VERSION3_HPP
 #define SRS_CORE_VERSION3_HPP
 
-#define SRS_VERSION3_REVISION 144
+#define SRS_VERSION3_REVISION 145
 
 #endif
diff --git a/trunk/src/protocol/srs_protocol_kbps.cpp b/trunk/src/protocol/srs_protocol_kbps.cpp
index 063b0dfae..11f119a53 100644
--- a/trunk/src/protocol/srs_protocol_kbps.cpp
+++ b/trunk/src/protocol/srs_protocol_kbps.cpp
@@ -166,22 +166,24 @@ void SrsKbps::set_io(ISrsProtocolStatistic* in, ISrsProtocolStatistic* out)
 
 int SrsKbps::get_send_kbps()
 {
-    srs_utime_t duration = clk->now() - is.starttime;
+    int duration = srsu2ms(clk->now() - is.starttime);
     if (duration <= 0) {
         return 0;
     }
+
     int64_t bytes = get_send_bytes();
-    return (int)(bytes * 8 / srsu2ms(duration));
+    return (int)(bytes * 8 / duration);
 }
 
 int SrsKbps::get_recv_kbps()
 {
-    srs_utime_t duration = clk->now() - os.starttime;
+    int duration = srsu2ms(clk->now() - os.starttime);
     if (duration <= 0) {
         return 0;
     }
+
     int64_t bytes = get_recv_bytes();
-    return (int)(bytes * 8 / srsu2ms(duration));
+    return (int)(bytes * 8 / duration);
 }
 
 int SrsKbps::get_send_kbps_30s()