diff --git a/types/highcharts/index.d.ts b/types/highcharts/index.d.ts
index 3d01d66443..917ab479ea 100644
--- a/types/highcharts/index.d.ts
+++ b/types/highcharts/index.d.ts
@@ -56,7 +56,7 @@ declare namespace Highcharts {
     }
 
     interface AxisLabelFormatterOptions {
-        value: number;
+        value: any;
         isFirst: number;
         isLast: number;
     }