diff --git a/public/dashboard/index.html b/public/dashboard/index.html
index 10bb7d8..79af7b3 100644
--- a/public/dashboard/index.html
+++ b/public/dashboard/index.html
@@ -515,6 +515,9 @@
                 var option4;
 
                 option4 = {
+                    grid:{
+                        bottom:2%
+                    },
                     tooltip:{
                         trigger: 'axis',
                         formatter: function (params) {