diff --git a/types/styled-system/index.d.ts b/types/styled-system/index.d.ts
index 67f1f87ba0..e2cdd2cddf 100644
--- a/types/styled-system/index.d.ts
+++ b/types/styled-system/index.d.ts
@@ -103,7 +103,7 @@ export function variant(props: VariantArgs): (...args: any[]) => any
 export type ObjectOrArray<T> = T[] | { [K: string]: T }
 
 export interface BaseTheme {
-    breakpoints?: string[] | Object
+    breakpoints?: string[] | number[] | Object
     colors?: ObjectOrArray<CSS.ColorProperty>
     fontSizes?: number[]
     space?: number[]