diff --git a/transport.go b/transport.go
index 9ba5925..2a359c8 100644
--- a/transport.go
+++ b/transport.go
@@ -71,17 +71,17 @@ func (nt NatsTransport) RoundTrip(r *http.Request) (*http.Response, error) {
 	// Get Response object from NATS message
 	response := NewResponse()
 	if err := response.ReadFrom(msg.Data); err != nil {
-		return nil, fmt.Errorf("nats_transport: %v", err)
+		return nil, fmt.Errorf("nats_transport: cannot read response from NATS: %v", err)
 	}
 
 	if response.Error != "" {
-		return nil, fmt.Errorf("nats_transport: %s", response.Error)
+		return nil, fmt.Errorf("nats_transport: NATS returns an error: %s", response.Error)
 	}
 
 	// prepare HTTP response
 	httpResponse, err := response.ToHTTPResponse(r)
 	if err != nil {
-		return nil, fmt.Errorf("nats_transport: %v", err)
+		return nil, fmt.Errorf("nats_transport: cannot convert to HTTP response: %v", err)
 	}
 
 	return httpResponse, nil