diff --git a/index.d.ts b/index.d.ts
index 5c12d85..289e3dd 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -38,10 +38,10 @@ export interface CustomBorderStyle extends BoxStyle {
 Spacing used for `padding` and `margin`.
 */
 export interface Spacing {
-	readonly top: number;
-	readonly right: number;
-	readonly bottom: number;
-	readonly left: number;
+	readonly top?: number;
+	readonly right?: number;
+	readonly bottom?: number;
+	readonly left?: number;
 }
 
 export interface Options {