diff --git a/highcharts/highcharts.d.ts b/highcharts/highcharts.d.ts
index 8bfa8d9441..ac10279d08 100644
--- a/highcharts/highcharts.d.ts
+++ b/highcharts/highcharts.d.ts
@@ -961,7 +961,7 @@ interface HighchartsOptions {
     title?: HighchartsTitleOptions;
     tooltip?: HighchartsTooltipOptions;
     xAxis?: HighchartsAxisOptions;
-    yAxis?: HighchartsAxisOptions[];
+    yAxis?: HighchartsAxisOptions;
 }