diff --git a/src/metrics.rs b/src/metrics.rs
index f2f7440..0fa4cf9 100644
--- a/src/metrics.rs
+++ b/src/metrics.rs
@@ -328,7 +328,7 @@ impl DefaultConsoleReporter {
             by_operation.insert(
                 operation.to_owned(),
                 self.build_item_report(
-                    &metrics
+                    metrics
                         .by_operation
                         .get(&operation)
                         .expect("Operation key cannot be missing"),
diff --git a/src/prometheus_reporter.rs b/src/prometheus_reporter.rs
index 7823da9..095cb8a 100644
--- a/src/prometheus_reporter.rs
+++ b/src/prometheus_reporter.rs
@@ -47,7 +47,7 @@ impl PrometheusReporter {
     ) -> io::Result<()> {
         info!("Sending metrics to Prometheus: {}", self.address,);
 
-        let registry = PrometheusReporter::build_registry(operation_name, &metrics);
+        let registry = PrometheusReporter::build_registry(operation_name, metrics);
 
         let metric_families = registry.gather();