diff --git a/packages/bar/index.d.ts b/packages/bar/index.d.ts
index e386a24bd8..307f40fb42 100644
--- a/packages/bar/index.d.ts
+++ b/packages/bar/index.d.ts
@@ -102,7 +102,9 @@ declare module '@nivo/bar' {
         axisTop: Axis | null
 
         enableGridX: boolean
+        gridXValues: Array<number | string>
         enableGridY: boolean
+        gridYValues: Array<number | string>
 
         barComponent: React.StatelessComponent<BarItemProps>