diff --git a/app/src/main/java/io/legado/app/help/JsEncodeUtils.kt b/app/src/main/java/io/legado/app/help/JsEncodeUtils.kt
index 549fe438e..e360fde7b 100644
--- a/app/src/main/java/io/legado/app/help/JsEncodeUtils.kt
+++ b/app/src/main/java/io/legado/app/help/JsEncodeUtils.kt
@@ -85,8 +85,8 @@ interface JsEncodeUtils {
     ): AsymmetricCrypto {
         return createAsymmetricCrypto(
             algorithm,
-            privateKey.encodeToByteArray(),
-            publicKey.encodeToByteArray()
+            privateKey?.encodeToByteArray(),
+            publicKey?.encodeToByteArray()
         )
     }
     //******************对称加密解密old************************//