diff --git a/openwisp_radius/integrations/monitoring/apps.py b/openwisp_radius/integrations/monitoring/apps.py
index 2f4c49dd..0f1ab96f 100644
--- a/openwisp_radius/integrations/monitoring/apps.py
+++ b/openwisp_radius/integrations/monitoring/apps.py
@@ -78,10 +78,10 @@ def register_dashboard_charts(self):
                     },
                     'aggregate': {
                         'download_traffic': Round(
-                            Cast(Sum('input_octets'), models.FloatField()) / 10**9, 1
+                            Cast(Sum('input_octets'), models.FloatField()) / 10**9
                         ),
                         'upload_traffic': Round(
-                            Cast(Sum('output_octets'), models.FloatField()) / 10**9, 1
+                            Cast(Sum('output_octets'), models.FloatField()) / 10**9
                         ),
                     },
                 },