diff --git a/build/css/index.css b/build/css/index.css
index 7b2b5b71..4bf6ee07 100644
--- a/build/css/index.css
+++ b/build/css/index.css
@@ -1,6 +1,6 @@
 /*!
  * 
- *   simple-keyboard v3.8.75
+ *   simple-keyboard v3.8.76
  *   https://github.com/hodgef/simple-keyboard
  *
  *   Copyright (c) Francisco Hodge (https://github.com/hodgef) and project contributors.
diff --git a/build/index.js b/build/index.js
index b7d514f5..372dbddb 100644
--- a/build/index.js
+++ b/build/index.js
@@ -1,6 +1,6 @@
 /*!
  * 
- *   simple-keyboard v3.8.75
+ *   simple-keyboard v3.8.76
  *   https://github.com/hodgef/simple-keyboard
  *
  *   Copyright (c) Francisco Hodge (https://github.com/hodgef) and project contributors.
diff --git a/build/index.modern.esm.js b/build/index.modern.esm.js
index af35adb7..729a7e4a 100644
--- a/build/index.modern.esm.js
+++ b/build/index.modern.esm.js
@@ -1,6 +1,6 @@
 /*!
  * 
- *   simple-keyboard v3.8.75 (index.modern.esm.js - Modern Browsers bundle, ESM output)
+ *   simple-keyboard v3.8.76 (index.modern.esm.js - Modern Browsers bundle, ESM output)
  *   https://github.com/hodgef/simple-keyboard
  *
  *   NOTE: This modern browsers bundle (index.modern.esm.js) removes all polyfills
diff --git a/build/index.modern.js b/build/index.modern.js
index 248a7bae..228d2309 100644
--- a/build/index.modern.js
+++ b/build/index.modern.js
@@ -1,6 +1,6 @@
 /*!
  * 
- *   simple-keyboard v3.8.75 (index.modern.js - Modern Browsers bundle)
+ *   simple-keyboard v3.8.76 (index.modern.js - Modern Browsers bundle)
  *   https://github.com/hodgef/simple-keyboard
  *
  *   NOTE: This modern browsers bundle (index.modern.js) removes all polyfills
diff --git a/build/interfaces.d.ts b/build/interfaces.d.ts
index 1dcda048..450a6dbf 100644
--- a/build/interfaces.d.ts
+++ b/build/interfaces.d.ts
@@ -13,7 +13,7 @@ export type KeyboardButtonTheme = {
 export interface KeyboardButtonAttributes {
     attribute: string;
     value: string;
-    buttons: string;
+    buttons?: string;
 }
 export interface KeyboardInput {
     [key: string]: string;