diff --git a/apps/emqx_utils/README.md b/apps/emqx_utils/README.md
index f8c386f3d..d03b34c64 100644
--- a/apps/emqx_utils/README.md
+++ b/apps/emqx_utils/README.md
@@ -16,6 +16,7 @@ handling, data conversions, and more.
 - `emqx_utils_json`: JSON encoding and decoding
 - `emqx_utils_maps`: convenience functions for map lookup and manipulation like
   deep_get etc.
+- `emqx_metrics`: counters, gauges, slides
 
 ## Contributing
 
diff --git a/apps/emqx/src/emqx_metrics_worker.erl b/apps/emqx_utils/src/emqx_metrics_worker.erl
similarity index 100%
rename from apps/emqx/src/emqx_metrics_worker.erl
rename to apps/emqx_utils/src/emqx_metrics_worker.erl
diff --git a/apps/emqx/test/emqx_metrics_worker_SUITE.erl b/apps/emqx_utils/test/emqx_metrics_worker_SUITE.erl
similarity index 100%
rename from apps/emqx/test/emqx_metrics_worker_SUITE.erl
rename to apps/emqx_utils/test/emqx_metrics_worker_SUITE.erl