diff --git a/prometheus_flask_exporter/__init__.py b/prometheus_flask_exporter/__init__.py
index f5ca7d0..6a6863e 100644
--- a/prometheus_flask_exporter/__init__.py
+++ b/prometheus_flask_exporter/__init__.py
@@ -679,6 +679,9 @@ def _track(self, metric_type, metric_call, metric_kwargs, name, description, lab
 
         labels = self._get_combined_labels(labels)
 
+        if metric_kwargs.get('buckets') is None and self.buckets is not None:
+            metric_kwargs['buckets'] = self.buckets
+
         parent_metric = metric_type(
             name, description, labelnames=labels.keys(), registry=registry,
             **metric_kwargs