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 9a178f4be..1f464db47 100644
--- a/app/src/main/java/io/legado/app/help/JsExtensions.kt
+++ b/app/src/main/java/io/legado/app/help/JsExtensions.kt
@@ -292,7 +292,7 @@ interface JsExtensions {
         val bos = ByteArrayOutputStream()
         val zis = ZipInputStream(ByteArrayInputStream(bytes))
 
-        var entry: ZipEntry = zis.nextEntry
+        var entry: ZipEntry? = zis.nextEntry
 
         while (entry != null) {
             if (entry.name.equals(path)) {
@@ -319,7 +319,7 @@ interface JsExtensions {
         val bos = ByteArrayOutputStream()
         val zis = ZipInputStream(ByteArrayInputStream(bytes))
 
-        var entry: ZipEntry = zis.nextEntry
+        var entry: ZipEntry? = zis.nextEntry
         while (entry != null) {
             if (entry.name.equals(path)) {
                 zis.use { it.copyTo(bos) }