diff --git a/app/src/main/java/io/legado/app/help/JsExtensions.kt b/app/src/main/java/io/legado/app/help/JsExtensions.kt
index 9e4bca018..754751b01 100644
--- a/app/src/main/java/io/legado/app/help/JsExtensions.kt
+++ b/app/src/main/java/io/legado/app/help/JsExtensions.kt
@@ -30,6 +30,10 @@ object JsExtensions {
         return EncoderUtils.base64Decode(str)
     }
 
+    fun base64Encode(str: String): String? {
+        return EncoderUtils.base64Encode(str)
+    }
+
     fun base64Encode(str: String, flags: Int = Base64.NO_WRAP): String? {
         return EncoderUtils.base64Encode(str, flags)
     }
diff --git a/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeRule.kt b/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeRule.kt
index 82a767ab5..c97fc7b98 100644
--- a/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeRule.kt
+++ b/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeRule.kt
@@ -577,6 +577,10 @@ class AnalyzeRule(private var book: BaseBook? = null) {
         return EncoderUtils.base64Decode(str)
     }
 
+    fun base64Encode(str: String): String? {
+        return EncoderUtils.base64Encode(str)
+    }
+
     fun base64Encode(str: String, flags: Int = Base64.NO_WRAP): String? {
         return EncoderUtils.base64Encode(str, flags)
     }