diff --git a/README.md b/README.md
index 7d79b68..63407e0 100644
--- a/README.md
+++ b/README.md
@@ -30,4 +30,10 @@ Features:
     - [ ] logging
     - [ ] tracing
     - [ ] metrics
-- [ ] broker, based on nats-streaming
\ No newline at end of file
+- [ ] broker, based on nats-streaming
+
+### Used modules:
+- https://github.com/grpc-ecosystem/go-grpc-middleware
+- https://github.com/grpc-ecosystem/grpc-opentracing
+- https://github.com/grpc-ecosystem/go-grpc-prometheus
+- https://github.com/grpc-ecosystem/grpc-gateway