diff --git a/src/main/kotlin/cn/rtast/fancybot/util/str/Base64.kt b/src/main/kotlin/cn/rtast/fancybot/util/str/Base64.kt
index 8e62c75..24127c4 100644
--- a/src/main/kotlin/cn/rtast/fancybot/util/str/Base64.kt
+++ b/src/main/kotlin/cn/rtast/fancybot/util/str/Base64.kt
@@ -19,4 +19,8 @@ fun ByteArray.encodeToBase64(): String {
 
 fun String.decodeToString(): String {
     return String(Base64.getDecoder().decode(this))
+}
+
+fun String.decodeToByteArray(): ByteArray {
+    return Base64.getDecoder().decode(this)
 }
\ No newline at end of file