diff --git a/plugins/sentinel/dashboard.html b/plugins/sentinel/dashboard.html
index 436393b..27b1af5 100644
--- a/plugins/sentinel/dashboard.html
+++ b/plugins/sentinel/dashboard.html
@@ -257,7 +257,11 @@
             try {
               if (charts.cpu) charts.cpu.update(cpuVal);
               if (charts.mem) charts.mem.update(memVal);
-              if (charts.net) charts.net.update(net.rx_bytes_sec||0, net.tx_bytes_sec||0);
+              if (charts.net) {
+                var rx = net.rx_bytes_sec||0, tx = net.tx_bytes_sec||0;
+                charts.net.update(rx, tx);
+                charts.net.maxVal = Math.max(charts.net.maxVal, 1024);
+              }
             } catch(e) {}
           }
           var infoR = card.querySelector('.col-info');