diff --git a/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeUrl.kt b/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeUrl.kt
index 588dbda8c..13153ce2c 100644
--- a/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeUrl.kt
+++ b/app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeUrl.kt
@@ -609,6 +609,7 @@ class AnalyzeUrl(
         return source
     }
 
+    @Keep
     data class UrlOption(
         private var method: String? = null,
         private var charset: String? = null,