diff --git a/app/src/main/java/io/legado/app/utils/EncoderUtils.kt b/app/src/main/java/io/legado/app/utils/EncoderUtils.kt
index ffc569ab3..409cb802c 100644
--- a/app/src/main/java/io/legado/app/utils/EncoderUtils.kt
+++ b/app/src/main/java/io/legado/app/utils/EncoderUtils.kt
@@ -1,7 +1,6 @@
 package io.legado.app.utils
 
 import android.util.Base64
-import java.nio.charset.StandardCharsets
 
 @Suppress("unused")
 object EncoderUtils {
@@ -28,7 +27,7 @@ object EncoderUtils {
     @JvmOverloads
     fun base64Decode(str: String, flags: Int = Base64.DEFAULT): String {
         val bytes = Base64.decode(str, flags)
-        return String(bytes, StandardCharsets.UTF_8)
+        return String(bytes)
     }
 
     @JvmOverloads