diff --git a/src/core/metrics/prometheus.rs b/src/core/metrics/prometheus.rs
index 56f57d8eb..d49ac645e 100644
--- a/src/core/metrics/prometheus.rs
+++ b/src/core/metrics/prometheus.rs
@@ -170,7 +170,7 @@ pub fn method_label(method: &http::Method) -> &'static str {
 	}
 }
 
-fn duration_histogram() -> Histogram { Histogram::new(exponential_buckets(0.005, 2.0, 14)) }
+fn duration_histogram() -> Histogram { Histogram::new(exponential_buckets(0.001, 2.0, 16)) }
 
 #[derive(Debug)]
 struct RuntimeCollector(runtime::RuntimeMetrics);