diff --git a/src/lib/interfaces.ts b/src/lib/interfaces.ts
index 736eb3dd..92db3c17 100644
--- a/src/lib/interfaces.ts
+++ b/src/lib/interfaces.ts
@@ -18,7 +18,7 @@ export type KeyboardButtonTheme = {
 export interface KeyboardButtonAttributes {
     attribute: string;
     value: string;
-    buttons: string;
+    buttons?: string;
 }
 
 export interface KeyboardInput {