diff --git a/core/telemetry/impl/service_impl.cpp b/core/telemetry/impl/service_impl.cpp
index ae37672ffd..6e98ef8c79 100644
--- a/core/telemetry/impl/service_impl.cpp
+++ b/core/telemetry/impl/service_impl.cpp
@@ -459,8 +459,8 @@ namespace kagome::telemetry {
 
     auto bandwidth = getBandwidth();
     rapidjson::Value upBandwidth, downBandwidth;
-    upBandwidth.SetInt(bandwidth.up);
-    downBandwidth.SetInt(bandwidth.down);
+    downBandwidth.SetUint64(bandwidth.down);
+    upBandwidth.SetUint64(bandwidth.up);
     // fields order is preserved the same way substrate orders it
     payload.AddMember("bandwidth_download", downBandwidth, allocator)
         .AddMember("bandwidth_upload", upBandwidth, allocator)