diff --git a/types/highcharts/index.d.ts b/types/highcharts/index.d.ts
index b192a5bd63..6c1b12419a 100644
--- a/types/highcharts/index.d.ts
+++ b/types/highcharts/index.d.ts
@@ -575,7 +575,7 @@ declare namespace Highcharts {
          * categories: ['Apples', 'Bananas', 'Oranges']
          * @default null
          */
-        categories?: string[];
+        categories?: any[];
         /**
          * The highest allowed value for automatically computed axis extremes.
          * @since 4.0