diff --git a/src/pages/overall/graph-overall/graph-overall.ts b/src/pages/overall/graph-overall/graph-overall.ts
index 568367a..0f1578b 100644
--- a/src/pages/overall/graph-overall/graph-overall.ts
+++ b/src/pages/overall/graph-overall/graph-overall.ts
@@ -56,7 +56,7 @@ export default class GraphOverall extends Vue
         },
         yAxis:
         {
-            min: 70
+            min: (value: any) => value.min - 10
         }
     };