diff --git a/crates/rpc/src/metrics.rs b/crates/rpc/src/metrics.rs
index 0214daa78..f609d10ad 100644
--- a/crates/rpc/src/metrics.rs
+++ b/crates/rpc/src/metrics.rs
@@ -98,6 +98,7 @@ impl RpcMetrics {
     }
 
     fn record_request_latency(method_name: String, latency: Duration) {
-        metrics::histogram!("rpc_request_latency", "method_name" => method_name).record(latency);
+        metrics::histogram!("rpc_request_latency", "method_name" => method_name)
+            .record(latency.as_millis() as f64);
     }
 }
diff --git a/crates/task/src/grpc/metrics.rs b/crates/task/src/grpc/metrics.rs
index 75b05fd69..9b72d6642 100644
--- a/crates/task/src/grpc/metrics.rs
+++ b/crates/task/src/grpc/metrics.rs
@@ -152,6 +152,6 @@ impl GrpcMetricsRecorder {
 
     // Record the latency of a request for a given method and service.
     fn record_request_latency(method_name: &str, scope: &str, latency: Duration) {
-        metrics::histogram!("grpc_request_latency", "method_name" => method_name.to_string(), "service" => scope.to_string()).record(latency)
+        metrics::histogram!("grpc_request_latency", "method_name" => method_name.to_string(), "service" => scope.to_string()).record(latency.as_millis() as f64)
     }
 }