diff --git a/app/src/main/java/io/legado/app/data/entities/Cookie.kt b/app/src/main/java/io/legado/app/data/entities/Cookie.kt
index d43fbf7e0..d5952e194 100644
--- a/app/src/main/java/io/legado/app/data/entities/Cookie.kt
+++ b/app/src/main/java/io/legado/app/data/entities/Cookie.kt
@@ -6,6 +6,6 @@ import androidx.room.PrimaryKey
 @Entity(tableName = "cookies")
 data class Cookie(
     @PrimaryKey
-    var url: String,
+    var url: String = "",
     var cookie: String? = null
 )
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